I was thinking about that actually. Seems to me it's actually beneficial to let yourself be killed, though maybe it's a shorter run back from the middle than it is from the spawnpoint. Of course you're always at half health at best coming back from the spawn point, but who knows?
Are you guaranteed that the spawn door will open right away if you've died from the blow up? I haven't noticed myself (even though I've died enough times in the explosions that I ought to know), but if not that might be a reason to try to get to mid. That door can take a long time to open.
Plus I'm usually down in health after leaving the spawn spot anyway, since I haven't figured out a sure-fire way to drop without falling too far and taking fall-damage.