Nah, even with the reproduction cart I still can't do the combos. I have a terrible sense of rhythm anyway, so I just mash randomly and hope for the best. Truth be told I wasn't aware that was an issue until after I stopped using it.
I felt weird downloading a game's ROM and playing it on my computer. It felt wrong somehow. And besides that I didn't feel like I was actually playing the game, if that makes any sense; here I was, playing what was meant for a handheld screen on a massive computer screen, using a DualShock 4 controller to play when the original device had half the amount of buttons. And it's not just VisualBoyAdvance either, even using the Virtual Console never felt right to me. Call it autism or whatever, but games just don't feel right to me unless I'm playing it on the original device (except Game Boy Color games for some reason, or if the game is ungodly expensive to begin with).