What are your thoughts about upgrading the hardware?Did you go with the chrome hardware or the gold?When I measured out the guitar it seems like the saddles couldn't be extended enough to get the scale length right.
Can you tell us what the measurements you have with the bridge in place?
As for a bridge upgrade, I'm not fan of the cast metal saddles. A upgrade to solid steel saddles might be all that's required. Other than that, a bridge plate is a bridge plate IMO (maybe not always, but in this case I think so) and a different bridge will likely not "drop in". Probably require re-drilling at the very least, possibly additional routing to the pickup cavity.
If the existing bridge is indeed not located properly, then you'll need to fill & drill anyway, so much of a muchness.
There have been issues in the past with TL kit bridge positions, but I thought they had improved with the newer production. It may be alright as is, but if we have hard numbers it will be easier to advise you.
I'm not surprised that two different timbers took the stain differently. Ash is a much more open grain timber by comparison to Maple.For whatever reason, the top only required two coats, while the back took 5 to get to where I wanted it to be!
It looks great though, and the sunnies are a nice touch!