For now, I'm willing to believe there may be some logical, if abstract, reasoning for why they can't increase the reservation timer. Most often, when an "obvious" solution isn't being implemented, it'll be because they, too, have already thought of it and determined some impracticality. If the login servers are struggling because they're overloaded, then saving a spot in line for everyone erroring out is counterproductive to the server erroring everyone out. They'd just need to make a new error to keep from getting stuck in the old one.

Or something dumb/weird like that. Cuz, seems more irrational to believe they could be extending the timer but refuse because they just don't care or whatever.