I get that you have chosen Cubase for its powerful midi capability. No issues there. But to choose another DAW purely based in Studio One's lack of instrument definitions is just plain dumb.
I just believe the moment you have any sort of hardware synth living in your studio you really need to learn it, understand it and be able to use it to its full. Just switching sounds remotely is not really maximising the use of that machine.
I personally think its fun too getting into the OS systems of these things. They are all different. Also I am within reach of my hardware synths too from where I am sitting making the job of setting up sounds on each one pretty easy.
As the late great Edgar Froese from Tangerine dream said he never uses factory presets because the guy next door has the same presets. Once you really start either editing patches or making them from scratch then that is when the music will start to sound original. I get that not everyone wants to do that for sure but how hard is it to simply select a patch on the from panel of the machine you are using.
And what about the situation when you might have thousands of patches for an instrument like the Roland JD800 that only has an internal memory of 64. Well it means you have to start loading them in, bank by bank and auditioning them. If you only use the 64 patches for your Roland JD800 then that is really limiting the use of that machine. You are missing out on the other thousands of patches for it.
Hardware synths require an approach to use them to their fullest. And it aint just leaving their patch memories where they are and using instrument definitions either.
Oh and what happens if you have got a synth that there are no instrument definitions for! Are you going to throw it away then.
Setting up multi timbral things is yes a little harder for sure but still it is no big deal. Some of my hardware makes this a snap. Others take a little longer for sure but it can be done. You can save those setups too and recall them pretty easily. If you have multiple synths I prefer to get each one only doing one sound per midi port. They always sound better that way anyway.