I would concur. Even in non-paratrooper games, it makes sense for a
capturing unit to move inside. Right now, it will wait outside for one turn
or even move away, until the capture task has been changed to an occupy
task. I've been planning to improve how the AI handles such cases. A lot
can happen in one turn ...
The key question is if captures (or attacks) from inside transports should
be allowed at all. In principle, I think not. Paratroopers should jump into
an empty cell, then attack on the ground from there. Jumping on top of
enemy positions is suicide, as several examples from history show, so it
should not be supported as a viable attack mode in Xconq.