Were you ever in any of the beta's from vanilla on? These are all things that used to happen in betas before, and from my personal experience testing this alpha its going to be in beta for like a month. Bugs exist in this game, they will always exist, the annoying phasing thing will be fixed next build, hell wod beta had "game breaking bugs" up til release, game breaking bugs are not something the testers find, blizzard knows about them and works to fix them internal, we test for the minor bugs that they wouldn't find through normal internal testing (and spelling errors, god blizzard needs a spell check, check the meta glyph for dh "meatamorphasis")
With where they are now, and comparing to previous tests of expansions I've been in (tbc, wotlk, mop and wod) without throwing nomenclature around, we are well on track for a july release.
edit: apparently the phasing bug was fixed, my bad, was playing OW :P