Yeah, at the very least, Joshua fights are unlikely to disappoint. I thought he looked a bit rigid at times and I was not overly impressed with his jab, but his power is undeniable.Yes (justified) and no to your respective questions. But I'll edit this post and answer more extensively in an hour or so.
Joshua is a decent boxer and a very good puncher. Few people will be able to stand toe to toe and trade blows - but you only have to get caught once to lose and therefore you still have to be careful. I think his movement in defence could be better, and he's not lightning quick of either foot or hand, however his combinations are pretty sharp. For a while against White he looked a bit one-dimensional, but it was uncharted territory in his pro career. That's not an irreversible flaw, it's about preparation and experience.
I do wonder if Joshua's progress will be slowed down in the next twelve months due to what happened on Saturday. He is still raw and I don't think he is ready for the best - or a returning David Haye.