Personally, I prefer the old purge. The new purge is too predictable. You can set up a dedicated purge base and massively cheese it. It also makes no sense why an army would be sent to loot your base with anything less than 10k gold in it.
The old purge was anything but predictable. Until the warning popped up, you didn’t know when it would hit, you didn’t know where it would hit, and you didn’t know what was coming.
The old purge didn’t have a final reward because the purge itself was the reward. Every attacker was lootable, and it was the only way to get many of the rarer thralls.
For those who did not like the old purge, a way to deal with it already existed in the Convergence Trap, allowing you to reset your purge meter (or increase it) at the cost of some resources. Unfortunately, the Convergence Trap was Siptah-exclusive, but Funcom could have easily made an Exiled Lands version too.
However, the old purge had limitations, which is probably why Funcom decided to create an entirely new system from scratch. Xevyr attempted all kinds of shenanigans to make his Purge Mod work better, but it still runs into many of the same limitations that Funcom’s purge had.
When Funcom introduced the new purge, the old one was completely removed from the game. It was not merely disabled and Xevyr reenabled it, it was wiped out of existence and Xevyr rebuilt it from the ground up.
I am sure if Funcom really wanted to, they could load up an old version of the game they have on hand and fetch all of their old code, but that is very unlikely to happen.
Sadly, the old purge is almost certainly never coming back in an official capacity. Xevyr’s Purge Mod is all there is and all there ever will be.