You could make the argument that the West is no longer the better conference, or at least that it's evened out to where there isn't much difference. Golden State is clearly the best team, but after that in the West Houston got worse, San Antonio got worse, at least until Roberson comes bask, OKC is overrated/worse. Denver and Utah are both a little better, as well as New Orleans and maybe Portland, and of course, the Lakers are the elephant in the room as they will improve, but they're not a dominant team, but the West IMO got worse over the offseason.
In the East Toronto is clearly better, Milwaukee certainly upgraded on the bench and is better, Boston will be better as they gel with Kyrie and Hayward back, and I think Indiana is better simply due to Vic being more comfortable as a 'star', Sabonis developing and some of the moves they made to strengthen their bench. I do think Philly got worse.
I'm sure it will change, most likely in the West, but if you matched up the top 4 current teams in each conference (Golden St., Denver, Utah, SA vs. Milwaukee, Toronto, Boston, Indiana) there's not much difference. Again, Golden State is the most dominant, but after that, you could maybe say the East has the next best 3-4 teams currently.