The real challenge is to go to war, cripple whole civs, and be a menace, yet still have wide approval.
Correct!
I just did a little test as I am looking at doing a grievance guide or at least finish the one 3/4 done. Here was a sequance of events of interest
T13 Scythia meets Ottomans
T14 Victoria Meets Incans and declares surprise war on them for 150 grievances
T14 Scythia meets Incans the same turn
T15 Victoria takes Incan city for 75 grievances
T16 Victoria meets Scythia who has No grievances against me but has -22 diplomacy due to my grievances against the Incans
T19 Victoria takes another Incan City for 75 grievances
T19 Scythia now denounces me for grievances against another player (I have 25 grievances against her, she has none against me)
T22 Victoria now takes the capital, all incan city loyalty grievances are gone
T23 Victoria Meets the Ottomans who have diplomatic grievances against me.
So in the ancient era girvances are decaying at 10 per turn but diplomatic issues due to grievances decat at 1 point every 2 turns
At T23 the diplomatic penalties are
Ottomans are at -13 Grievances from other players against us
Scytyhuians are -30 Grievances from other players against us
Basically the warmongering is still there in dioplomacy and has been renamed to "Grievances from other players against us"
If a player does not know me they cannot get grievances against me but if they know someone who knows me they will get the gossip that I have been a warmonger
The killer is with old warmongering you would get no penalty in the ancient era, now you get quite nasty stuff.
They sort of shot themselves in the foot on this. Warmongering early now will make people hate you for a long time so you give up on diplomacy.
The whole idea of grievances was to decay this hate decently. I am all for negative dip Favor due to warmongering but this level of hate early is just wrong