I am, like others, pro smaller alliance sizes. Max tag size of 40 would suit me. Alliances have proven time and time again they can function well with circa 40 members (p3ng/App/Asc/DLR et cetra).
Why not give it a go..?
More alliances, more alliances politics, different dynamics to the game would be so much better in my opinion.
I would ever go as low as 30 man tags... Would make the game completely different
With 10 man gals it would force cooperation, even for gal raiding... Would make for a very interesting, at least political, game.