I think it would be really handy to be able to 'collect' your beetles after they're dead, because at the moment dead beetles don't serve a whole lot of purpose besides the few that are craftable or using them as a toy. Since 'collecting' your beetles kills them anyway, it would be a nice way to make it easier to collect them.

This is coming from someone who collected a lot of dead beetles before the beetle book was added, because I wanted to collect them all, but now there is essentially no purpose to these beetles that I already have.