Not having forced moves as an option comes up every so often, and it is - in general - a good idea. The way I'd like to see it done would be instead of having a forced order, a line in your order log would say "The Army in Vienna is forced to disband". Maybe this could be sent as a notification too, as Eadan suggests (although players already get a lot of notifications).
However, there are a few reasons it's unlikely to be at the top of the todo list for a while.
1) This is actually a fairly substantial change. Currently, the adjudicator doesn't do anything with the possible future options of a unit at adjudication time. This change would bring forward some of that processing, and would need to take great care to not make the code messy.
2) Testing this is a *lot* of work - there are a lot of edge cases. The adjudicator is tested automatically with the DATC tests, but they're not designed to catch the kinds of bugs that could be introduced with this change. For example, if one player has a forced disband, and a retreat with options, then we don't want the phase to auto process (in fact, the DATC doesn't specify any tests that deal with progressing the turns - that's not what it's about). There are other edge cases that would need careful testing to make sure that we're not breaking anything. Currently the adjudicator works correctly, and I think players would be understandably pretty upset if we changed that, even accidentally.
3) I still think we'd get complaints about "not having a retreat". Although, every few months we get an email complaints about not being able to retreat to a square that had a bounce in it (which is correct), so perhaps this is no different to the current situation.
The real killer here is the large time investment to make and test this change provides a only a small benefit (I don't think a forced move sometimes holding up the game is a big problem, so fixing it is only a small benefit). Additionally, I think if we added a "rulebook press" mode (ie, no talking during builds and retreats), then forced moves would be readied up more often.
If anyone wants to put in the legwork to cleanly make and test this change, I'd be happy to accept it though.
~webDip dev team