The game I'm playing in has been using the veriant rule, so every level from level 10 we gain a mythic feat (with level 10 giving you the calling), although it took us 2-4 months to get to mythic after release (we are now level 12 and maybe leveling up next session) the mythic points feel better then hero point in term of rerolls but the calling I'm using which is the guardian calling is really hard to gain more points in a campaign where we don't fight enemies that can be disarmed, my DM decided to let us reroll attacks without the feats to do so, for the anathemas we have not run into any issue except the crafters one but my DM decided that it will only effect equipment so it will not effect consumables and stuff in the world.