I got my trial shirt in today. The fabric quality is pretty much what you'd expect for a $20 MTM. The fit needs some adjustments, but is closer than anything I can find OTR.
Any thoughts on how to make this look better?

I can't speak to the quality of those, although I bought a shirt in blue twill (k292) when it was on sale but no longer available. It's different from the current k292a.
FWIW, k292 was listed as pure cotton, two ply, 100 thread count, 125g. I can't wear it without an undershirt as it's more transparent than I expected. It has a soft feel to it but is not very thick. I guess I was satisfied at the sale price, but I'm not sure how durable it is and I know nothing about fabric quality. I only wear it with jeans.