>>48796233pretty good. Affection doesn't start getting intrusive until at least the 5th gym and even then herbs can easily counteract it. The EXP all, even if I don't like it being forced, actually distributes experience in such a way that you're never actually overlevelled unless you willingly do grand underground shit or constantly grind.
If you don't like the original DP, you won't like BDSP. If you feel like Platinum blows the original DP out of the water, you'll also not like this game that much if only because it uses the dogshit DP pokemon distributions.
BDSP are only good games because they build upon games that are good anyway.