I don't see a need for a change. I'm more pleased with the new enraged than with the former. The only things that needs addressing is the AC 90 and efect on AI.
My 0.02 gold
Even if enraged is fixed so that it effects that AI, it would still be useless at AC 90 as it is now. A bunch of units just running around the map and attacking only if you are at war with a civ. That is a point that I can see in Sarisin's complaints.
I did think of another solution but didn't include it because I figured it would be even more hated than enraged is now. That would be to allow enraged units to attack any unit of any civ regardless of war or peace. I think it would be cool at AC 90 as that would cause the total chaos that is intended during that time. Some people would really hate it though for the same reason they hate enraged now, you have no control.
The main downside for me would be early enraged units (crazed, lunatics, werewolves) declaring war in the early to mid game causing chaos that is not intended then. It could be interesting but for many, it would be bad.
One solution to this of course is still implement two different promotions. One that works as enraged does now used on the units listed above and the second one for AC 90 that would allow these enraged units to declare war when attacking.