Well, I've always enjoyed your PRC entries, your SF2 Drive track and others, and always thought you have a recognizable sound to your music, so I'd definitely say keep going, keep going. =)
But yeah, I've too felt for a long time getting more into music theory would be immensely helpful for me, so I can relate to that I guess. Ear-training, I can heartily recommend just trying to transcribe compo stuff by ear. When it comes to VGM arranging (especially in this community), since you don't need to get everything down how it was in the original, I've figured just getting a part of the source figured out and expanding & differentiating from there is enough. I think I've gotten a lot more accurate and faster the more I've done it. Transcribing something that plays in my head has become easier too.