If something like this happens again and its reset day and this outage will prevent you from completing the time given before the reset occurs then you can be given an item, like a voucher in game that for X amount of time you have to run ST over again, and get a piece of gear only. During this time after you use that item the clock will run. During this time you can't roll on slabs, oils, sands, or the onion knight. Instead how about you'll get a buff on your character when the server pops and will count down as soon as the servers are live for X amount of time.

So just to sum it up. The methods suggested above is if you were inside of ST, when the outage on SE side occurs, you did not get a piece of gear this week, you can only roll on gear, everything else is blocked, and its for only the time you lost. Either the voucher method or as soon as the servers are up method or an idea someone else comes up with. Being in que for ST doesn't count, only if you were running ST.