Just some thoughts on the vauban rework, and what I thought on it - I really like where its going, but really think we should remove minelayer.
Vauban is CC, and that's always been his thing, so he needs to keep that as his primary role, but perhaps change the way his cc works so he comes more viable in harder content.
This sounds and looks really good, but in order to be used more, feel like they should add something extra too. These new Tesla Drones will roll around, following the player. Once an enemy comes within range, these Drones will latch on and emit a shock that stuns the target for x seconds, and the drones last for x number of shocks before being replaced.
In addition, each enemy killed after being hit by a Drone increases Vauban's Amplifier.
OVERLOAD 50 energy
Vauban emits an electric pulse with range of x metres around him. All enemy electronics are temporarily disabled, e.g. weapons jammed, for x seconds - including nullifier shields. This is usable even within a nullifier bubble.
Standard bastille and vortex. Keep Bastille's armour stripping, but give a different buff depending on enemy - corpus, shields, grinder armour, infested health.
A deployable beacon marks a location on the map. After a short countdown, the area is struck by a massive orbital laser explosion (and yes, it does work indoors). Instead of a locked cast animation, make this a deplorable grenade.
ELECTRICAL AMPLIFIER (passive)
Every enemy killed after being hit by Vauban's drones increases his Amplifier charge. As Vauban's Amplifier increases, it powers the circuits of his warframe and bolstering his defences, with each enemy providing a damage reduction buff of x%, to a cap of x%.
In addition, his Amplifier metre provides an additional buff to his other abilities.
Overload: vauban and allies receive damage buff to incapacitated enemies to a max of 25%
Bastille/Vortex: each charge increases the duration by x%
Orbital Strike: each charge increases the damage of Strike by x%
Whilst the use of other abilities drains the Amplifier metre, it does not limit using the ability, it just reduces the amount of buff you receive.
Reason for this Amplifier is to provide Vauban with some survivability - using the balls to charge his amplifier, whilst simultaneously using the metre to improve the base abilities. 2 and 3 serve as his crowd control, limiting enemy capability and providing ability no other frame has (counter nullified whilst within a bubble), and his 1 provides a brief stun on any enemy in range. His ultimate would provide decent damage and wouldn't be a press 4 to win, as you have to use your CC to manage your enemies in such a way to maximise the damage potential you can provide in a certain location.
Obviously, I'm not exactly sure how numbers work for this and what would be balanced - but I've tried to keep the ideas of this proposed rework (drones, combo of bastille/vortex, and the orbital strike) as well as provide something entirely new (with overload).
Just my thoughts anyway, hope it could be useful.