Due to their broken status i'm the polar opposite, every single time a xeno outbreak occurs i cringe, and think "Welp there goes the round, we're all dead, and most RP is down the tube" and if they get wiped out quick i think "Oh boy, its not ruined, but now we don't get a fun enemy to fight like terror spiders or a blob"
Overall Xeno need a huge rebalance, and in all honesty, the sheer amount needed to fix them and make them interesting and fun seems to be on par with taking ideas from Colonial Marines and creating new sprites for new xeno types to fit abilitys and ability walling.
What i mean by this is:
Terror Spiders:
Open Vents: Brown Spider Only
Infect Crew: White spider Only (Infection is not fatal when allowed to come to term, infected pass out for a bit when spiders hatch)
Ranged Attack: Queen Only
Stunlock Attack: Prince of terror only
Destroy Walls: Royalty spiders only
Speed: All spiders are slower than crew
Tankiness: Only 3 types of spider can tank crew attacks, but not for sustained periods
Cloaking: Only grey spiders can become invisible, and only then on spider webs (Not sure if this is still a thing)
Xeno:
Open Vents: All xeno can, though only from on top of the vent
Infect Crew: All xeno can carry 2 facehuggers to infect crew (Infection is fatal if allowed to come to term, COMPLETELY destroying the body, removing a player from the round during outbreaks)
Ranged Attack: Sentinel xeno get a ranged acid attack, all xeno can carry 2 ranged facehugger attacks
Stunlock Attack: All xeno have a stunlock attack that is repeatable ad-nauseam
Destroy Walls: Queen and all Sentinels can melt walls and airlocks
Speed: Every xeno is faster than the crew by a factor of 2
Tankiness: Xenomorphs have a 50% extra resistance to brute damage, the most common in game, but take 50% extra burn damage
Cloaking: All hunter xenomorphs can cloak
When compared side by side, Xenomorphs need some serious work to get them on par with terror spiders, and honestly terror spiders almost seem like they were made to replace xenomorphs as an antag entirely.