1. I think the Walt "special powers" angle has potential, but it's unfortunate that they won't be able to invest much time into it. Walt is already a lot bigger than he was when they started the show, and it's only been 60-something days in Lost-land. after the summer hiatus, he may come back 6 feet tall with a mustache and tattoos. so he will be effectively written out of the show...hence, so will Michael.
2. it's always the same crew (Jack, Sawyer, Kate, Locke, Hurley, Ecko, Michael, Charlie, Sayid, Jin) that get into the physical confrontation shenanigans. in group shots (funerals, beach, etc.), I've seen other fairly big, athletic looking dudes in the background. why aren't they recruited to help insted of Locke the gimp or Charlie the hobbit? if they're going to put extras in the background and not involve them in the plot lines, they could at least get little scrawny girlie men. or midgets.
3. it's not fair to some of us that just want to watch the show that in order to really follow along with what's happening, you have to be willing to do all kinds of homework by reading books, calling numbers, and checking web sites. I love the show, but I don't feel like doing all of this extra credit work with Widmore, Hanso, cast contracts, etc. so I guess I'll just have to enjoy the show for what it is. and for Kate.
4. even though everything seems to tie together, I find it hard to believe that they had 2+ seasons of material already fleshed out and ready, complete with twists, turns, and Portugese magnetism experts. I think it's all dynamic, retro-fitted to go with what we've already seen. that's why the "monster" has conveniently been missing lately, and why the Black Rock had no other significance but as a place to put the dynamite for them to find. and if it's all made up on the fly, just about anything can happen...and many things will never be solved.