You read my mind @pyxal .... cropping will be added in v5. But a different tool. We'll see how that goes and go from there.
Aviary would be good but as now owned by Adobe and requires keys and so on.. so not as attractive as used to. Had previously integrated it in a project and thought all the stickers would be fun again. Will keep an eye on that.
Currently in v4 you can limite the image upload size in the config.php file.
As long as the template.php has some nice max-width stylings it should also appear nicely if used outside of the Gallery.
Glad also @jdloudon we are on the right track!
All the workshops we do here in Japan and speaking to users on the forums / email are being really helpful in shaping v5 to be the best yet