It's all about the resurrection of the Heavy Lance. You can actually use it's entire reach now, which allows you to comfortably take on opponents with 2h up to 120 reach and polearm up to 150 if you got your timing down. Which means that you can take on most melee players from the front, you can even challenge players with longer weapons if you use a bit of trickery. Now charging aware people is tricky and risky, but few things are as satisfying as seeing a 2h hero turn towards you eagerly, only for you to firmly plant your Heavy Lance in his face. All those shorter polearms that can rear now are largely irrelevant as long as you carefully plan your attack and escape, you can outreach all of them.
I play with a Destrier and I am finding it hugely enjoyable and it is easily capable of getting me to the top of the scoreboard. I spend a lot of my time punishing cav scrubs that rush the spawn or crutch on heavy horses and it is very satisfying and I am getting loads of points.