Already suggested.
( https://planbserver.com/forum/index.php?topic=844.0 )
But..
Jonne: We can try the sniper and saw thing, but we won't add the obstacles in the duel arena.
1. Duel is considered pure 1 vs 1 fight with no hiding or anything like that, adding obstacles will make it more complicated.
Not really, some people in PTP duel to improve their skills in PTP, majority of PTP includes how to use environments to your advantage shall all hell break loose.
The current duel system is already bad enough in that regard since some weapons like MP5 and Combat Shotgun can't be even chosen. Besides he is just asking for a special 'extra' duel arena, those who don't want it can avoid it. Simple.
2. Adding obstacles will create more lag or FPS drops for the players and maybe some players' game gets crashed due to those obstacles, it's force crash. (Happened before).
There can be two approaches to the obstacle adding :
Either use a interior or a certain part of the map, or add simple objects and not rice the fuck outta the arena.
If the player's computer can't even do that then he should seriously be considering how the hell will he even be able to play maps like Flint County and Las Venturas in normal PTP.
3. The duel arena is not that wide, so adding obstacles will make it very narrow and so players won't be able to enjoy the fight.
He never mentioned the type of the arena so how did you assume it's not that wide, he didn't even say add obstacle to normal arena or maybe just one and that doesnt make it narrow lol, the normal duel arena's height is the one that is narrow and you can't even throw nades properly unless you attempt ricochet.
Several bugs can be occurred.
Like what? We have a huge fucking UFO with a cow, a custom blue light, two sniper towers and the game works perfectly fine even in the mini laptop where I got 14-30FPS in the lowest quality.
Using natural covers is a good thing c'mon.