The decision-making when it comes to balancing is always so odd in ETF2L. Banning the LnL with the biggest factor being "it does more building damage" is so out of touch with the meta of the game, its apparent that whoever made this decision has never played against a team that is really good at the turtle sunshine last hold (or any turtle hold for that matter)
The weapon excels at hitting easier pipes in chokepoints and long range, if theres a problem with it its definitely not the building damage. On top of that another factor that lead to the ban is
In a competitive environment rollers are barely used on purpose
If this was true, we would see more demomen running the stock launcher. The truth is, that even if it is not the old mega OP version, the iron bomber is still an upgrade to the stock launcher mostly because of the rollers. Of course nobody goes out of their way to use rollers as their main way to damage someone, but it's still nicer to have the rollers in the vicinity of your enemy if you miss. The iron bomber does everything the stock launcher does, but better. You get upgraded rollers for like -10% splash radius, it's a straight up better version. So why is the weapon that works completely different and can offer a different playstyle banned instead of the actual upgrade?
More importantly, why is stuff like this not fixed with a plugin or whatever? ETF2L already dipped their toes into a pro mode lite by buffing gunboats with a plugin, so how come we just dont fix unlocks that offer different mechanics the same way? For example, make LnL pipes do 90 damage instead or something.