I usually take the +2.
Think I took Magic Initiate: Warlock one time on my druid test run just for Eldritch Blast since I had no decent ranged capability and don't like shapeshifting, her Cha was higher than Dex or I would have taken Weapon Master instead. Mobile can be useful if I have a token melee character and want them to actually be able to hit the enemy before the rest of the party does all the damage, but could use the speed increasing gear instead. Otherwise, I find the rest of the currently implemented feats to be rather pointless.
Waiting for Observant, although this may be more fun/useful in proper DnD, War Caster, and Sharpshooter, but only if that one works as intended with the -5 being optional rather than mandatory. Possibly Skulker if they fix the broken stealth. The others I like will have to come from mods.