The Magrider indeed will be used as a Char B or M3 Lee/Grant, just with strafing. Both of those were semi-tank destroyers as their heavies firepower came from a fixed forward mounted gun.
The PS2 Magrider always was a bit of a sniper vehicle due to that, close quarters it's going to get completely pulverized as it was in PS1 as it wouldn't be able to deliver its high damage as effective as other tanks and would be made more stationary.
The only advantage it has to compensate is the ability to circle strafe, but it and certainly not its strafe speed seemed that fast in the footage we've seen so far, so I wonder if it'll be enough. Either way they will be very vulnerable to flanking again.
To me, I wouldn't mind the Magrider being turned into a TD if the other factions also get a TD and the VS get a new main tank.