So there's a bit of chatter on the forums about how OP the Doom is right now, but as many people have pointed out the actual beef people have is with its system Mine Strike, particularly how it allows the Doom to confound Omnishield AI and effectively act as its own flanker (amongst other things).
For those who don't know, the Doom didn't always have Mine Strike: it used to have a system called
Interdictor Array (and before that it had Fast Missile Racks). Mine Strike came about after
this blog post that was actually about mines used by Star Fortresses. The Doom got the mines as a buff because it was underpowered at the time.
The reason the Doom was underpowered though was because it wasn't fast enough to take advantage of phasing on its own merits. This is no longer true with Phase Mastery's Elite bonus, and IMO Mine Strike always felt tacked-on to the Doom - it feels like a system that a ship needs to be built-around (i.e. a dedicated mine-layer), a ship that has to make sacrifices on other fronts; whereas the Doom seemingly makes no sacrifices with a impressive weapons package on top of an impressive offensive ship system.
I propose that we cut the Doom in half -
create a new Phase cruiser that uses Mine Strike, but has a relatively weak weapons package (small mounts only), and
give the Doom a different ship system (or its old system, Interdictor Array). This new Phase minelayer would be more of a support ship, creating flanking opportunities for other ships with its mines rather than being a one-ship flanking machine. It could of course still devastate fighters, frigates and low tech ships on its lonesome, but for a phase cruiser I don't think that's unreasonable.
... Or if creating a new ship is too much hassle, you could even make an argument for giving the Revenant-class Mine Strike! Thematically it fits - the Revenant would have plenty of cargo space to hold mines, and while sold as a "phase tender" you can't tell me that Tri-Tachyon has never used Revenants as cloaked orbital bombardment platforms...