really loving the pikemen i've seen them done like that before and they are just awesome, if only it was financially viable to do all state troops with great swords, captains cool, you going to put something under his foot? at the moment looks like he's sneaking out a fart, somewhat surprised you chose that head i wasnt that big a fan of that one much prefered the helmeted one.
Halberds awesome again, hordes of them is the future in my opinion i don't tend to leave home with out 2 units of 40 :P
Loving the demi gryphs to, with regards to your question as far as i am aware with FW it really depends who and where you play, i think the general idea is to have permission as the stuff is often thought of as over powered or tester rules but most stuff would be fine in friendly games i reckon. With regards base size its always a strange one as bases are never set in stone for example with the new empire griffon im fairly sure i can still use my iob one with his smaller base, i think it essentially you go by what the base it comes with, with regards to tournaments etc but should be fine in friendly games to use what you want really as long as it's not to over the top size wise
Can't wait to see more, fairly sure I've already rated you 5 stars which sadly is not enough for what is in the log :P