I know of one teacher that made the change from Hapkido to (our style of) Aikido several years ago. The Aikido teacher arranged for a demo of Aikido at his place and vice versa. The Hapkido teacher found Aikido more interesting and changed art :-)
When training with him or his students I notice they (still) put much more force in the techniques. And I still feel they practise techniques, not content, but that is slowly changing for the better.
For what it is worth....