Hi @delawaregrad
We did recently add a filter to change where the user was directed to after successful submission, however we found that it affected the submission process, a design detail I wasn’t aware of at the time, so I’m a little hesitant to recommend it until we can ensure the submissions still get processed. Eying trying to get this taken care of for 1.2.3 soon.
I personally also want to get some more hooks and filters in place to help with this, that 3rd parties can latch onto and do their own thing with, that wouldn’t interfere with the submission process, we just haven’t gotten those added yet.
Most basic and quick “hack” that I could help with would be filtering the gettext field for the success message, so that you could customize that a bit.