Nothing has changed at a first glance. IMHO, elimination of 4-match surges have amplified streakiness of pRNG slightly. Previously, there were more random factors as surges are random. While now, there are less factors and if it is streaky, it continues a bit longer lasting through more matches and has a bit more impact overall due to its extended nature.
Speaking of which, I lost two matches this week to a single TDS card with almost intact teams. I first killed all TDS buddies and I think I used Mab. But then, TDS just kept looping and looping powering itself and spawning its own mana and multiple skulls until it killed everything. When it happened for the first time, I was left speechless for about a minute and actually was quite fascinated. IIRC, I’ve seen this for the first time, rather peculiar event. IDK what the chance of this happening but I think normally, chance of TDS getting extra turn might be about 50-60%. So, having 6-7 extra turns is not very likely but not completely impossible. Nothing is impossible in GoW. I’ve had starting boards twice in GW on a brown day that had 2 and then 3 brown. Chance for 2 brown on starting board is about 7E-5 objectively speaking.