Some random "facts" about tanks, rovers and domis:
The dominatrix player has to micro range hard or lose their gamble, the tank player just has to retreat or attack.
Kodachi is a fantastic unit against most rovers, and sent in numbers, will beat dominatrix.
A non babysitted dominatrix can be baited with nanoframes.
Most games I see tank players complain about dominatrix literally sent units headfirst into them, knowing full well it was on the cards. If you act like a (slow) raging bull, dominatrix will be used as an anti heavy. Similarly, if you send fleas into an outlaw, this does not make outlaw OP. This makes you silly.
Rovers have 0 lategame units. Dominatrix allows them to pretend that they do, and balances this problem out slightly.
Tanks are mostly lategame units. Their start is shakier as a result.
Tanks got a little more viable after the econ changes because they can afford their expensive units quicker.
During rovers vs rovers mirror clashes, the first player to switch to TANKS will win the clash hands down, it's a logical hardware upgrade. However, tanks unsupported by rovers don't roflpwn nearly as much.
And lastly, personal feeling. Dominatrix is a weird unit, a true gambler's choice. It's the only unit that will protect rovers from tanks (particularly rover killer king - Ogre) aside from dart. With darts met by kodachi, all we have left is dominatrix. I feel like people have played less carefuly and suicided to dominatrix where they could have easily facswitched fleas, roaches, phoenix, thunderbird, licho, glaives, daggers, blastwings, grizzly, firewalker, puppy.