Wich (is worth mentioning) may not be as bad as it sounds ...
Since as we know from Fextralife items video, there are certain items that adds bonuses depending on what race holds them.
Not really sure if those bonuses will be worth our character tho ... but its not ultimately hopeless.
I don't really see this. I mean, Polearm Master + Great Weapon Master is awesome, but for warriors and they get this proficiency anyway. Any other class can already pick up a quarterstaff and wouldn't pick those feats ever. I think, maybe getting the reach of a halberd on a monk would be fun, but now he has to be strong to use it properly.
Also, I think the items he named aren't necesarily weapons; there;s probably something good for everyone. Think of the amulet that sets your INT to a flat out 17. This allows you to start dipping into wizard, or respeccing and dumping all your int points.
Now, in earlier versions of D&D, you had to allocate the weapon type you go for, either profiency points or weapon focus/ specialisation etc. In 5E, if you find Crom Faeyr, you can use it properly on any warrior.