I'm not noticing much difference from last Maintenance in regards to lag. The party lag I deal with hasn't gotten better nor worse on my end.
I don't know your system, but there may be an application, driver, recent system update, etc. that could be interfering with SB.
If that falls among those comments that would tell us to "stfu and get off this post", then you won't hear anything more from me other than "good luck". There's only so much one can do.