Hey Sheryl, I'm here with your requested critique
Actually I'm kinda flattered you would ask for my critiques, everything you have here is so pretty and shiny
Anyway, I'll do my best
Contrast is not an issue for the style you have developed, so don't stress over it.
You are right about the sharpening thing, though. It's not that the graphics are LQ, it's more like they couls be juast a little bit crisper.
Though I usually don't recommend it, the Topaz clean filter is actually very useful in defining those little details and at the same time give a better aesthetical result than most sharpening filters.
Of course, it has to be used in a low opacity, and my favorite mode is CrispStyle
(every setting really low!)
If you don't wanna/can't use that, then you'll have to go with the ol'fashioned sharpening too and Unsharp Mask filter, which will do the trick just as fine.
Another thing is that even though you do not abuse text, you do tend to use really large fonts. Sometimes less is more
I'm not saying that the end result is bad, but before you place the text, ask yourself "does it need to have text this big? Does it even need text in the first place?" Sometimes I've come to realise that text can be just a detail. An image does, indeed, speak a thousand words.
That's about it! I love how you use the light in your work, and everything you make is so soft
Finally, I think your weakest graphics are these (for no other reason that that they are just not as good as the rest): your top CI and the bottom blend (text is kinda overpowering on that one)
I hope this helped. PM me for questions!