Having this era fresh in my memory, in general I can only really nit pick on some of the stories and some of the production values on others.
The companions:
Ben and Polly's send off could have been improved, well actually given one would be a start.
Victoria, she is okay in the main, but I was glad she was replaced by Zoe really. I would have written her better, they could have given her better roles in one or two of the stories and some better dialogue.
Zoe, nothing to complain about here at all, there is a lot of love of the catsuit already. But Zoe's outfit in The Krotons, very short skirt is worthy of my admiration also!
Jamie, I acknowledge him as my favourite Second Doctor era companion. Happy with him, but as a suggestion maybe we could have seen more of a development in his character, as a historical character seeing all these wonders in the universe and all the future advances. I think they may have been room to give him some development in this area, of him taking it on board a bit more. Still having said that I am more than happy with his time and journey alongside the Second Doctor.
The stories:
The Moonbase, nit picking here, but just a touch more humour in this serious story and I would upgrade it to almost as good as The Tomb of the Cybermen,
The Tomb of the Cybermen. Nothing plot wise, couple of production errors only.
The Ice Warriors, like it's later Ice Warriors cousin The Seeds of Death, two solid stories with good ideas and themes. Nothing really suggests itself, if anything some of the characters in The Seeds of Death are less memorable and engaging than in The Ice Warriors.
The Enemy of the World and The Web of Fear again nothing obvious. Just more of the Cook in Enemy and wish we had seen Tobias Vaughn in Doctor Who again, up against Jon Pertwee or Tom Baker.
The Dominators needs an episode taken off it and written more tightly, Quarks repaced or better realised surely.
The Mind Robber suffers in my eyes any way, of episode one being blindingly good and the rest is a bit flat. More variation in how the dangers of the realm they find themselves in are conquered by the TARDIS team.
The Invasion I wouldn't touch anything.
The Krotons has a base good idea of slavery, but I would dump everything else, especially those awful Krotons. Maybe a Dalek story instead, I could envisage two of three desperate Daleks manipulating a race like this for example.
The War Games, nit picking again but chop it down to at least eight parts and have a bit more of the Time Lords in the penultimate part, as I loved them in this.