As i am not a programmer nor IT professional, i am just a simple press photographer. I will keep listening for info on the gallery situation and hopefully one day this will be resolved.
Zenphoto is the only gallery script I’ve found that can handle uploads of 5+ Mb hi-res image files. NextGen is an excellent WP plugin, but not designed for professional photographers. Not sure if you’d need that for your BP gallery. That could be the trade-off going with a native beta BP plugin.