So a couple of days ago, I noticed admins added an exclamation mark on where the blob spawns, just like at york to indicate when you can do the quest again. Maybe it will be more useful if admins add a blob timer somewhere on the map so it will be easier for people to track down cuz its really annoying that you've been waiting for like the whole day just for the blob to spawn and ended up missing it cuz you went to the restroom or decided to grab some snacks and maybe this will lessen the mob pkers and boosting going on.  

A blob timer would just cause absolute chaos. Whenever the timer hits 00:01:00 (a minute), the whole server would be rushing to Swamptown causing a huge lag mob.  

uhm, a timer would cause an even larger mob? since everyone would know exactly when it would spawn?

That's not how the blob works anyways, it doesn't spawn at particular times. If you want it to spawn, just kill the regular slimes. Even when the blob had just died, I was able to spawn it again in less than 30 minutes or so.