Better idea for a new drone strain would probably be along the lines of a reinforcement strain. Like a hivelord where you can upgrade walls and doors at the cost of plasma and a longer time. Another ability could be to reinforce tunnel entrances and other xenos (give them a 10-20 bump overhealth pool kind of like fruit for a short duration, it costing plasma and health in the process but it can only be used on full health xenos, while the tunnel entrances just take a longer time to fill and or require them to be dealt with via C4). Another suggestion could be the drones can also coat things in resin to reinforce already non-xeno structures to make them slightly harder to break with bullets or explosive (or just make it so there the same health when they explode but the reduce the impact of explosions a bit more)
Basically reposting this as an actual idea instead of a comment, since if done right it wont effect balance much.
Light buffing drone that can act like a slow knockoff hivelord/shaman type carrier (with full health only temporary low max health buff) in a way.
Can only use resilience pheromone
Also another idea with the reinforcement resin could be turning window frames into resin walls or a variant called chitin walls which might be more explosion resistant (bullets and melee could have more damage effecting the walls to balance it out a bit).
Just some suggestions to spice up those beanos