First of all, update to X3e if you haven't already because it has some take lane fixes.
Some people really don't like Take Lanes, some people do. The only advice I can give you is when I first started using comping, I was attempting to write a column about it for
Sound on Sound. I couldn't wrap my head around it at all. Eventually I read all the documentation and learned the various tools - not a trivial task - and realized that everything I had learned about layers in previous versions was essentially irrelevant. Trying to apply those techniques to the current paradigm not only didn't work, it caused problems.
I also learned there was a big difference between using the Smart Tool and the Edit Tool, and that using the Take Lanes like layers was possible but again, required a different technique. The Take Lanes are optimized for a particular type of comping and you kind of have to do it the way Sonar wants you to do it.
Some people were sufficiently upset about Take Lanes I posted a thread called "
Solutions for Using Take Lanes as Layers" that described what I had learned so far. Quite a few others chimed in with tips about what did and didn't work. This thread contains tips like "After recording your Lanes/Layers,
DON'T USE THE COMPING TOOLS FOR EDITING unless you actually want to comp using the workflow for which Take Lanes were intended." I also did
an article for Sound on Sound on comping that you might find useful. (A line to which I'm sure you will relate: "I predict X3's new comping will make some people's heads explode at first, because although the look is similar to what Sonar had before, the tools and procedures are quite different.")
Now, to your situation. First, it's no secret I'm a fan of Ableton Live for live performance but for DAW/studio work, Sonar is my tool of choice. If the studio is your orientation, Live probably won't do what you want. Second, when you're under a deadline, having to learn something you
thought you knew from scratch is an issue.
The option that worked for me was just to stop and work with comping and layers on a scratch project. After 2-3 days, I got really good at it. But whether you can afford to take off a couple of days and become proficient with a significantly different feature is a question only you can answer.
At this point I use take lanes all the time both for comping and similarly to how I used layers. Once I got into it, my workflow sped up significantly. But that's my experience, and I don't really quite understand your workflow so I can't say with any certainty that how you expect to use take lanes will be similar to how I use them.
I think the most important take away is this: Comping is one thing, editing using Take Lanes like layers is another. They use different tools to perform different functions, and "crossing over" between the two is not advisable. There is a learning curve, although in my case, it turned out to be an investment - the time I lost getting proficient at the new protocol has since been offset by the amount of time I've saved.
Hope this helps, check out the links and see what you think.