The only problem with the XL is how it's balanced versus other weapons in its area at the moment (Small Guns). The buff to snipers, the sniper rifle having -1 ap to use now makes it a bit better on that side, but the XL is a better weapon than the Pancor Jackhammer, G11/G11E and P90c at pretty much everything, whereas they should all have their niche.
The XL vs Sniper Rifle balance is a lot better than it was before thanks to the -1 AP use reduction, but the XL vs Pancor/p90 at short range goes in favor of the XL, as well as the XL vs G11/G11E at medium range (XL is downright better than the G11 and G11E because they received no buffs to account for it, and are way rarer/can't be crafted).
The G11E logically should be the best Assault Rifle classed weapon in the game, with the G11 below it, the XL below that (with a blueprint requirement for crafting), the FN Fal below that and the Assault Rifle below that.
The p90c and Pancor Jackhammer, due to their very limited range, need to be much more powerful at short range. The XL outclasses the Pancor Jackhammer and p90c in damage most of the time and especially at one-hex, but it also has a way longer range than both.
I'm fine with Assault Rifles being the versatile middle ground in the Small Guns class (between SMGs and Snipers) but I feel like it's better than both simply because it does both so well. 50 range single shot on XL should be reduced to like 45 or something (or Sniper Rifle/Bozar ranges buffed to 56).
The burst rounds for the p90c and pancor need to be raised to make them way scarier at close range pvp (they currently have less burst rounds than the 15 the XL spits out of its 45 round mag), as well as reducing burst rounds of the XL back down to 12 from 15 (with 36 round mag or something).