The revamped ending probably didn't add much for those that already liked the ending (concept stayed the same) and may have helped clarify some people's problems, but those that didn't like the concept still wouldn't like the new ending.
Concept aside, I think that the major difference between extended and original ending is the tone, which is the main reason why I consider the extended ending quite vastly superior compared to the original.
In the original final dialogue, Shepard took somewhat resignedly pretty much everything at face value and there was way too little info about the choices, which made the sacrifice hollow. Moreover, the fate of Normandy was unclear and the destruction of relays effectively felt like a destruction of the setting.
The extended cut allows for more player agency in the dialogue, with high enough EMS relays are not completely destroyed, the fate of Normandy is clarified, the memorial scene adds a sorta acknowledgment of Shepard´s sacrifice and the epilogue voiceovers are generally quite uplifting. These changes altogether result in the ending that feels tonally a lot more in spirit of the series. I still think the synthesis ending is ridiculous, but the other ones are just fine in my book.
With the extended cut in place, for me the only major issue that remains is the fact that there´s way too little of war assets shown in action which also goes hand in hand with the final stages being designed as largely non-reactive. Ideally, the "ending run" would play out similarly to ME2´s suicide mission, but some additional cutscenes or help on the battlefield would be also good improvements I think.
There are also some weird decisions like geth fleet being shown only if quarians were wiped out (if peace was achieved only the quarian fleet is shown), similarly to this, in the base camp there´s a possible dialogue with a geth prime, but if peace was brokered he isn´t there, and if genophage cure was sabotaged and krogans didn´t find out, there´s still no salarian rallying speech shown in the camp (it only appears if the cure was sabotaged and krogans came to know about it, aka Wrex was alive).
Also, all the Citadel defence assets gathering feels moot, since nothing about the fate of its inhabitants is shown.
All in all though, thanks to the shift in tone, I think that with the extended cut the ending is ok overall.