It was not a great venue: I would much rather have had both accommodation and programming in one building, which is the usual pattern -- a useful lesson for future committees.
It was not a great bar: I would much rather have had a choice of proper beers, and it was a pity that the real ale bar which was promised never actually materialised -- a useful lesson for future committees.
It was not well-organised in terms of programming: I would much rather have seen people timetabled on panels who were actually at the convention; I would much rather have known that participants had been given proper notice or consultation -- a useful lesson for future committees.
It was not a great dealer's room: I would much rather have seen the sort of quantity of trade that we had last year. Many dealers said that this was the slowest Eastercon in memory, and I think this was due to people staying away in anticipation of the other issues mentioned above.
However, I didn't go to Eastercon for the venue or the bar or the programming or the dealer's room. I went to meet my friends (those who were there, at least) and that part of the convention was a great success, even if many of the conversations were painful and distressing for reasons unconnected with the quality of the convention.
Were there another Eastercon with the same issues, I would still be in attendance.
Convention-specific highlights for me included the chance to help with the newsletter, and my appearance at short notice in the Call My Bluff panel game ("I am not only familiar with this word, but ...").