I try not to worry too much about that kind of thing, due to it still being relatively better than it was. I know timkes have moved on, but Doc Who now is better for its time than Doc Who ever was before.
Take Spearhead from Space- brilliant Pertwee story, one of the best paced of the era, great bad guys in the Autons... bloody stupid rubber tentacles to repreesent the Nestene at the end. The entire miscontinuity with the Nestene in the new show being lqiuid plastic is entirely forgivable on the premise "the original interpretation looked shit."
Caves of Androzani- contender for best story ever. Bloody stupid monster in that too. Worse, doesn't even have any decent input into the plot. Story was still brilliant.
Limits, of course. The green pantomime horse beast of Warriors of the Deep was a punctuation mark on the disaster that was that story. Good last line, ironically. Five seconds of quality follow several episodes of shite.