I enjoyed it (as a punter). The difference of one as opposed to two days was completely transparent to me apart from forgetting I didn't have a second day to play a game I was interested in

I can see it probably makes a difference to traders, spreading a similar take over the cost of two days but pretty irrelevant to me, except it narrows my choice a little - but not really a problem.
As for the bring and buy - name me a year there hasn't been a complaint - it looked fairly civilised to me, but I'll be honest I very rarely bother and even more rarely find anything I like at a reasonable price if I do.
Only real complaint was the lack of lighting on the back wall downstairs.
Otherwise a great day out and really glad its back. I wouldn't go near Salute if you paid me and Partizan etc are way too difficult to get to for me so I am hoping Colours has made a permanent return.