Tank is looking great I actually like the tang in there depite all the crazy tang police. All fish are cramped in any tank compared to thier native habitat. I've had wrasses 10x more active then tangs and yet their requirements were less than half. A tomini is the most appropriate tang for a tank that size. I have a yellow tang in my 40 gallon breeder only temporarily but he isn't nearly as active as the leopard wrasse I used to have and the wrasse's requirements were 50 gallon and the tang is 100 gallon. I understand Tangs get larger but their activity is a bit over rated and I think if people are going to put such high tank ratings for them they should include other highly active fish such as wrasses and pygmy angels. I'll get crucified for most of these statements but the hobby in general inhibits all animals but if you feed them well and care for them that should be all that matters, but that is all within reason of course. There are many who would put a hippo tang in a 10 gallon and that is just plain ridiculous.
....yeah..
I would rehome the Tomini and opt for smaller fish... It's ridiculous to say "our tanks aren't as big as ocean anyway so whatever" so that makes it right to not care much about what the creature actually would need?
A lion would normally have the African fields to roam, so any cage won't replicate that so it's fine that we keep him in a dog cage.. no it should have a certain amount of acreage to run and have its own territory away from others.