My disappointment came with Franklin becoming the dus ex machina for universe altering events. I like my Franklin as a mutant, and not knowing what his powers are yet.

Since neither of them are going to be erased from history and memory, I guess I can live with it.

In all honesty, when JB briefly turned Franklin into an adult during his FF run, I was hoping that he'd stay that way -- and then fly off into space, never to be seen again...at least for a long while. (Yes, people would've compared this to what Winter did in MIRACLEMAN. Why care?) 

I suppose this would've interfered with the plans for POWER PACK, though.

Unfortunately, that was pretty much the way FF #216 ended when the recently hyper-evolved Futurist went off to seek his destiny among the stars. That issue was also a primary one for Franklin as it was the first time in more than fifty issues that he had used his powers. Since JB worked on #216, the parallels and repetition would have been a little too much for readers, I think.

Someday I hope for some discussion for the 2001 X-Men and why their restored powers weren't enough the devastate the sentinels. It seems that just Magneto, Rachel, and Franklin couldn't demolish a squad or six of them while Logan, Ororo, and Peter used the commotion as cover to get into the Baxter Building. Or basically... Magneto, Phoenix, and the unfettered potential of Franklin Richards seemed a lot for the sentinels to handle, to me.