I can't say much about Destiny quite yet, due simply to the fact that very little has been released on it. More than likely they'll show off a lot more at E3, and then I'll be able to form an opinion.
Agreed. Giving players the opportunity to play and report bugs would be quite helpful to the development of future Halo titles. Not only that, but I would thoroughly enjoy getting to play Halo 5 early
I want the Spike and Firebomb grenades to make a comeback. I loved those in Halo 3. I'd also love to see a Promethian (I don't know if I spelled that right) equivalent of a grenade launcher.