In the current form, the Guild resistance shrines don't scale well and don't enhance the game as much as they could.
30 pt fire resistance for "free" at 1st level is broken. 30 pt resistance at 20th lvl for "free" is... underwhelming.
I recommend the shrines provide a stacking buff instead of the flat rate. Somewhere between 2-5pts/tier strikes me as the right fit (ergo the greater resist shrine would give a stacking resistance of 6-15). 1st level characters would be well equipped with a few points of resistance, and 20s would be happy with a higher aggregate resistance.