Tab collars are a fun retro style. I could never get on with them myself (too fiddly for me) but that's no reason not to like them in themselves. What I would say is that, similar to button-down collars, I think they benefit visually from having some tie space at the top. I actually prefer no/minimal tie space on normal collars, but ties with a tab collar (or if you really must, BD collars), do look better with some tie space to balance the narrowing below out visually IMO.
The rest of the look is really great; good colours, in balance.