OK so to give really specific advice i need a datalog to work off of.
now lets talk about some of the things that I changed when i did the tune update.
1.) VE table: i simply smoothed the fuel table above the idle range this was a very minor change and likely affected the tune little
2.) AFR Table: I made large changes in this table but the changes were mainly in the idle and cruise ranges, these have little affect on the acceleration range of the vehicle. I removed the choppiness in this table, you want the AFR table transitions to be smooth and they need to make sense for the load range the engine will see.
3.) AE or acceleration enrichment : this is likely the major factor that fixed your stumble and buck, you may need to add some more to this curve. Like i said above without a datalog to look at it is hard to give you accurate advice.
I need to make a video on how to tune the AE this is a common issue and people have a hard time understanding how it really works and how much it affects the tune....
You can compare the two tunes to see exactly what i changed, hit 'file' then scroll down to 'compare tune' and load the tune you want to compare the current tune to. This will be most effective if you load the old tune then compare it to the tune i sent, you will then be able to really see the small changes i made and how heavily those small changes affected the tune.