I don't think manually created kits will make any difference, it's been established that the 2box hardware is not capable of handling busy patterns, it's ideal for a beginner learning 4/4 AC/DC songs but once you want to go David Weckl things fall apart...
I've sent my SD3 samples created with SDSE to many experts around here, even to Rik, and they were all baffled since there is nothing wrong with these...
I tried to create a full kit from the Fields of Rock SD3 expansion manually in my mac and studio one but I saw that it would take me a lot of time to do it so I just drop the idea, but again, I don't think SDSE is the problem either.
Even karbonfaifa has admitted now that he has glitches, microglitches but he noticed them so....
Anders is happy with AD2, so he won't go and buy SD3 only to confirm what I've discovered almost 2 years ago with the speedlight kit....
I moved on from 2box, to a Roland TD-50X with digital Pads, triggering SD3 all the time, the most expensive controller I've owned.....