It seems quite unlogical to me when you play g3 in combination with c4. You will have to get out with your queen to retrieve the pawn or you will go for it using your bishop. Hence, I would suggest that when you play g3 you will not play c4 early in the game. I consider c4 the breaking move of that position. If everything is well in place, you can play c4. Until that time, wait and prepare.
The reason why it might not make much sense is because of the sharp lines that come later in the game LoekBergman. But I do think that most of the tactical possibilities favor white. It takes a lot of studying to really understand the possibilities that occour in the main line catalan.
Hard to handle? It's equal. Anyway I used to reach that position when I opened with 1.c4 and IIRC you're not supposed to try and win back the pawn right away on move 5 like that... in fact in some lines you just keep developing normally and don't win it back for a long time (if black tries b5).
I know main catalan theory suggests 5.Bg2 but I ran into some road blocks there. So I adopted Qa4+ simply because it is easier to play. Also if I look hard enough maybe there is a way to gain an edge with it. But I understand where you are coming from. I know a lot of top players play Bg2 instead of Qa4+.
But I think maybe the problem is with the line I am showing you is that perhaps white could have done better earlier. Do you guys have any suggestions for moves that could have been played during blacks sequence of bishop moves for example? (i.e Bd7, Bc6, Bd5)