I'm fairly lenient but I'd say for the morphing weapon it's reasonable to assume the wand chamber remains in the weapon as long as the weapon is a suitable size/valid item for a wand chamber. For example, there's very little different in a mace and an axe (in terms of being a pole with a thing on the end), a wand chamber in the handle wouldn't exactly need to morph.
For wandstrike, I'm 50-50. I think the intent is to basically turn the wand into a club. Wand chambers do allow you to use wands "as if you were holding them" though. So maybe yes. If so It'd be just the weapon damage plus strength, no sneak attack etc...that's explicit in the feat.
Alternative reading of the feat the weapon now does a base 1d6, no matter what it was before.