I can't imagine why anybody would mock TOS's original FX. The Enterprise always looked like a real ship. (The original model is huge if you've ever seen it in person.) The series even won an emmy for the FX in The Tholian Web. It's not ever going to be confused with shots from 2001, but it's a product of it's tv era. TOS could also reuse footage and recombine shots which Who usually couldn't.

I think most of the time, DW's FX were brilliant on a tiny budget. (And the size/image quality of televisions back then probably covered up a few shortcomings.) Dinosaurs is probably the only time they stumbled badly. Somebody must have used a really old outdated book on dinosaurs as a reference, as that T-Rex just looks really odd.

And having a lavish budget isn't always a guarantee of good FX. I still remember the tv miniseries adaptation of The Martian Chronicles from 1977. It had great locations, impressive sets, and and all star cast. The FX shots were like something out of an Ed Wood movie, and this was in 1980!