Well, I called Bob at LaserMax and explained the issue (EXTREMELY difficult to push the On/Off switch in to the full "ON" position), and he said the problem could be with the "battery compartment spring" (too stiff: pushing to hard, requiring too much pressure to push the on/off switch in), or with the takedown lever itself. He gave me an RMA # and I'm going to return it so he can check it out, fix it, or replace it. I'll let everyone here knows what the outcome is.
Just FYI, I disassembled and reassembled, removed and replaced the batteries, checked spring tensions manually, cycled the slide, etc. about 100 more times, to see if it ever improved...making sure everything was aligned and seated properly each time, but no difference, ever.
So, hopefully it will be a simple fix. We'll see.
PS: Bob said he has seen this issue before, a few times.