I went from being pretty decent (have tapped many high-ranked belts) to average at best. I just can't get over the whole grabbing me thing. I can't go for my kimuras because someone is holding my effing sleeve and/or my pant leg. Wtf. They say I'll get better (at no-gi) by training in the gi but it feels like I'm getting worse. haha
Has anyone else gone back to gi training and found it to be extreme frustrating? 
Wow. Thread title should say '...after many years'. My apologies for the confusion.