JB, that rear is looking great. The spoiler add-on is going to look great. Be sure to author a DIY.
I think it would look great absent the adition of the acent stripe. Unless...
You could fashion a thin and narrow low-level LED strip accross the add-on, to align with the brake lights... maybe so the strip illuminates at the same level as the aftermarket tail lights. PW could help you with that...
I mean... it appears you're going big.
If there is enough interest you could fab a bunch of those and have Daniel Andrew sell them for $576.94 each.