Hello Patrike,
I think the new way AM calculate grin is little too optimistic. In my own example, for a hashrate of 45 H/s, with stats set to "current", AM tells me i would gain around 1.89 coin per day. For real, i get around 1.12.
So to have a more realistic number, i had to set a profit factor of 0.68 in coin properties.
I don't know it it's a real issue but i prefer to make a feedback on this...