@mysti35 I would like you to try this, in-game click the tracking icon on the minimap > un-check Track Quest POIs.
It really depends on how many quests that are being tracked, some quests have tons of spawn points etc the addon has to work hard to create the Blue Highlight area.
As far as freezing, perhaps try clicking the DG minimap icon and selecting Essential Mode or Off Mode, then go in to a queue for a BG or 2v2 etc report back with findings