Super swamped and distracted but wanted to toss some suggestions at this.
I use the dock for anything I need full access to as I work. No this is probably not EXACTLY what you are looking for (but it strikes me that each Console Strip or Track View strip/entry could really benefit from a Show/Hide button for all FX in the bin... by which I mean you could click it and the GUIs of all inserted effects in the bin would pop up or be hidden... this could however be a massive potential for a resource spike/crash... but I digress).
So I've got a track or bunch of tracks I need to tweak FX on. I simply drag the FX GUIs into the dock. Then I just have to press D and navigate to the correct tab to tweak what I need to. If it is a larger GUI than is easily accommodated by the dock then I just drag on that FX's tab at the bottom of the dock which will undock it and now it is in its own resizeable window. Once I am done I drag it back into the dock for storage until I need it again.
The problem with this is that if you have multiple instances of the same effect on different tracks then you have to pay attention to which one you are tweaking. This is why I generally close the GUIs of FX I am not spending a ton of time messing with. Then if I need to access it again it is a simple matter of double clicking on the FX bin entry on the Console strip or in the Track Pane to pop it open again (if I want them all FX on a track open I just double click on them all and there they are and then they can be dragged into the dock for easy access... doesn't take a lot of time).
In the dock there is a priority of tabs so if you drag something into the dock it will end up at the end of the tab list. So if you open the GUIs of all the FX on one track and drag them into the dock sequentially then do the same thing for another track you can easily navigate to the set of FX for each track by shuttling through the tabs in the dock (ie: Track 1: FX 1, 2, 3 will be in order... move over a bit and Track 2: FX 1, 2, 3 will be in order).
So yeah... spending some time getting a workflow together with the dock is worthwhile.
HOWEVER... another option is FX chains which I believe can have all the GUIs contained within the chain pop up at once. So you could put in the effects you need, create an FX chain in the bin (which will put all the FX into a single entry in the FX bin) then I THINK there is a way to just pop it open so all GUIs are available... but I am not sure. It is something to look into anyway and sorry I am muddled on the process (I should be using the buggers more but I've been doing other stuff).
BUT the reason I really wanted to bring up FX Chains is you can create ProChannel FX Chain modules and assign the most used controls to knobs on the module. So if you know you are going to mostly be tweaking the Gain, Treble and Bass on an amp sim and the Threshold and Attack on a compressor and the Wet/Dry on a reverb then you could create those controls on the Prochannel FX Chain module and have it all easily accessible by pressing I on your keyboard on a track by track basis. Then from there (because there is unfortunately a limited number of controls that can be assigned to such modules) if you need to get at unassigned controls it is very easy to open up the module and get at the GUIs of the FX being controlled by that FX Chain (which of course can also be saved as a Preset so you can revert back if you want or load the chain into other projects).
The other benefit of this Prochannel FX Chain method is it looses (not loses) the FX from the restrictions of the actual FX Bin. This means you can put it anywhere on the Prochannel to be effected by other modules as needed as opposed to the strict "Pre/Post" nature of the actual FX bin.
Now the other thing that should be noted is that the included Prochannel modules (such as the QuadCurve, compressors and other gack) should be tried first before tossing things into the FX bin. It just makes things a heck of a lot easier to mix when all you need to do is press I (and if needed navigate to the Prochannel tab or add the PC modifier) and make your tweaks as opposed to dealing with a ton of GUIs. Most of the PC stuff is good. Really good and many of us don't even bother with FX bin stuff unless it is really necessary.
Which of course an Amp Sim IS necessary to use the FX Bin or and FX Chain module BUT if you get comfortable with the FX that come in the PC and know how to use them then all of a sudden the ONLY thing in that Prochannel that requires the FX Bin or an FX Chain module is the amp sim which means you can dedicate more buttons to it in an FX Chain PC module (as opposed to having a crapload of other stuff) or it means you can only have the amp sims GUI in the dock or floating or a quick double click away.
That is the main idea of the Prochannel. Ease of use with quality effects so you really don't even need to use the FX bin except for very specific applications.
Anyway... that may be just blathering but that's how I work these days instead of screwing around with a ton of unnecessary VST windows. I just select the track, press I and 95% or what I need is already there.
Cheers.