Yeah he is OP as all hell now with this change (increased gold, not the XP bonus) and imo easily the best early civ by far in the game, as long as you play him on a slow speed and with barb clans active.
Played him on marathon speed yesterday, and with one pillage you get enough for your first settler or 2 warriors (4 warriors if you buy them from Clans) and you are still left with some lump gold.
Have one or two camps early on, and you can raise an army in no time and totally decimate your Deity AI neighbour without any real hassle.
It also has pretty much no opportunity cost to do this either, meaning you can play fully peacefully behind this in terms of expanding, improving tiles and placing districts.
All while raising a huge army (or buy settlers or whatever) for practically no effort.
In my current game Im farming 5 Clans every 10 turns, and I have 9 cities in the ancient era, a huge 330 military score army, and bought myself Isidore of Miletus for wonder rushing (getting great bath on deity is hard you say? Not with this guy lol) and a prophet to get a religion for zero effort.
Its just that broken.
It's like a more consistent and overall much better version of Qin.
Until this gets a nerf, he is just flat out the best leader in the game, no questions asked.
Not a fan of this either tbh, but it seems like Firaxis want people to get broken toys because that drives sales/interest.