Its a good season overall. I feel it gets a bad rep because it came before the cancellation crisis, so people just assume it was crap and that's why the show failed.
Attack is a good story. Its a little continuity heavy, but I enjoyed it. People say the Doctors reaction to Lytton's redemption doesn't make sense but IMO it does.
Lytton was under the Daleks control, and furthermore he wasn't just a mercenary. When the Cybermen captured him, he could have sold the Cryons out and the Doctor and humanity, but he withstood torture and conversion to protect them all, and died saving the Doctors life.
Vengeance on Varos meanwhile is a classic story, and easily one of the best of the 80s.
Mark of the Rani meanwhile is an excellent story that gives us a more ccomplex, yet unsympathetic villain in the Rani. I remember my dad always used to say that the reason they never bothered with the Rani in New Who was because they couldn't just write her as a psycho, or wanting the Doctors D LOL. Lets be honest that's what most of the villains in New Who are. A villain like the Rani who can in someways justify herself to the hero, whilst still being reprehensible is difficult to pull off.
The Two Doctors meanwhile is enjoyable. Shockeye is great, Colin is on top form, but it does waste Patrick Troughton, and the story is a jumbled mess in some ways. Jacqueline Pearce I'd say elevates it more than anything else as she is one of the best guest actors they ever had.
I love it when she just flips out. "KILL HIM, KILL HIM!" classic Servalan moment there, also the bit where she licks the blood off the floor is disturbing. I was even more impressed to read that was improvised.
Timelash sadly is as shit as everyone makes out. Its a neat idea of the Doctor meeting a historical figure, and one ironically that New Who would do much better with The Shakespear Code and Vincent and the Doctor (which having rewatched recently is as good as its made out to be.) Other than that though its crap.
Revelation fortunately more than makes up for it, and is one of the best Dalek stories. It explores new areas for DW with its black comedy, Davros is at his best since Genesis, and Colin though sidelined a bit gets to show a more compassionate side which is great. Even just little moments like comforting Peri over the DJ, or honouring Orcini's last wishes.
Jobel is also one of my fave guest characters. He is just vile, and I love the fact that even his actor hated him, hence why he insisted on his wig falling off which was a genius touch.
Overall not a bad season. In fact I'd say its as good as season 12. Like that season it has one stinker (Timelash/Robot) whilst the rest all range from good (Attack of the Cybermen, Two Doctors, Revenge of the Cybermen) to great (Sontaran Experiment, Mark of the Rani) to classic (Revelation, Genesis, Ark in Space, Venegeance)
Sadly however like I said because season 12 was the start of a glorious era, people overlook its duds or average stories, whilst with 22 because it came before the hiatus the reverse is true.