I think the population of teams that would be interested in Kyler Murray is smaller than you think, but I agree that a lot of teams who are already interested in him aren't discouraged because the organization has been a mess.
That said, teams that were concerned about his size or whatever probably haven't erased where they crossed his name out.
I think you're way off base on trade comp, if only because a Trey Lance-type deal is (maybe) only available when it's attached to a rookie contract that allows you to build a veteran team to support the prospect. Kyler on a pretty fairly expensive veteran deal might not reap those kind of rewards.
Of course, all you need is a bad organization to fall in love with him, but he doesn't have the resume of DangeRuss.