since everyone has been shittalking dragonborn:

FR dragonborn are actually pretty cool (in fact, theres no non cool dragonborn, 4e dragoborn are arguably even better)
The entire plane shift bullshit may be stupid, but then again remember that Unther is literaly populated by Egyptians.
from earth. so this entire Stargate thing isnt new to FR.

Meanwhile Thymanther Dragonborn are pretty based.
They dont know wether or not they caused half of their nation to die instnatly (basically 5e happened and the planeshift hting reversed and most of their land safe for their capital vanished)
So they end up beeing a very martial nation in a place in FR that is, lets be real, not very flesehd out at all. Unther is basically on the level of Maztica in terms of "lets just play DnD in a hollywood windowdressing of a historical period and area)
So adding in a new regional power of martial fuckwits that hate dragons btu dotn know how to deal with other humanoids and on top of that do not understand the concept of Gods because in their world there are none, is actually making the region a lot better.

Likewise they also have a military that has some pretty cool ideas.

Overall dragonborn get hated for all the wrong reasons.
if FR lizardfolk were actually well written we didnt need those guys, but alas very few things in FR are very well written

Also on "4e changes were shit", well you forgot about the good parts nameley getting rid of all those overpowered NPCs and letting the PCs actually do somethign on their own, Eberron did the same thing way back in 3.5 and everyone loved it