I just like having a variety of everything. If we are getting, say, three new rides at a time, make one a Disneyfied thrill ride (think: BTM, SM, etc), one a dark ride (think: TLM), and one a unique family experience (think: TSMM).
Is that where the disagreement on this thread is happening? It seems like a lot of pro-thrill ride folks here are asking for more of Disney's version of a thrill, not a crazy mega coaster a la Six Flags. Right? Or am I reading it wrong? I don't see why Disney needs to be one or the other - that's always been the magic of WDW for my family. There's something for everyone, and a lot of it. Tame rides aren't just isolated to one area, and neither are thrill riders. I'd hate to see Disney become JUST thrill rides or JUST family rides.
As to the original question: a more family-geared experience is definitely needed at HS as it stands now. I would have preferred a Pixar land versus a Toy Story land, but if you think about it, it would have been very hard to make a Pixar-themed land "immersive." Their films are so different, I don't see how you could make the transition from movie to movie seamless. If they had to keep it to one movie, Toy Story makes the most sense - it's had the most sequels, the biggest following, and the one of the most unique settings.