No, pretty sure TIE/D is costed exactly where it needs to be.
Do people have, like, amnesia? Nobody really flew Defenders before either title because they were overcosted, and could not take the imperial end-all miracle cure of AT. They need point reduction or "free" new abilities to jump back to being usable at all. It's why those cards exist (besides TIE/D being very much in-line with the original Defender lore)