My go to rig is the Texas variety because I can fish the Senko back through heavy cover in a lot of different ways. With that said, I've been practicing with a wacky rig more and have been having the same issue with being able to feel a strike, especially in really heavy cover where you can't feel the Senko hit bottom because it's probably settling in or on vegetation. To compensate, I've started doing one tiny, tiny little twitch after it hits what I think should be bottom to feel if there's any tension on there before lifting, retrieving and re-dropping. Works pretty well for feeling if there's a fish on when the line hasn't moved and also occasionally provokes a strike as well.
Re: hooks, since I've been fishing in really heavy cover, I've been testing out and having good success with weedless finesse hooks. Still hard for me to unlearn my childhood trout learnings about visible hardware being a total no-no with worms but the bass don't seem to mind at all that their snack is hanging from a round contraption.
If you are fishing somewhere that doesn't have a ton of vegetation, I'd highly recommend trying the O-ring method of rigging. You basically use small, rubber O-rings that you can find at hardware stores to thread the worm through and then hook your circle hook just under the O-ring and not the worm. Keeps the worm from getting chewed up by the hook and works like a charm. It works better for regular Senko's than finesse worms but the first picture gives you an idea of what we're talking about (on a weedless finesse hook). However, the key is to have an O-ring that is tight enough to hold on tight to the worm... otherwise, after you get a big strike, you end up with what you see in the second picture. Nothing.
Mike
p.s. The pike pictured in my other post ("Just another day at the office...") as well as the 7-8 bass I mentioned were caught on baits wacky rigged on weedless hooks the size of the one in these pictures.