Thanks for the feedback!
Yeah, I think the textbox frame gets in the way. If I'd had more time I think I would have wanted to switch the text to the right side of the screen when both a text box and a CG were on screen, so it wouldn't cover up my CGs, I think it's especially bad with the ending one and two cgs.
I consoled myself with the fact that you can see the CGs afterward in the album, but it's just not the same.