In no circumstance is it "A tacticly good idea" to ram a ship into another ship unless you're mentally unstable.
Anyone who needs abilities like this, plain sucks.
If you can steer your ship into an enemy and make the hit WITHOUT an ability and get the in game explosion damage, then awesome good job, but I cannot think of any time where "ramming speed" would be any kind of a viable option, except maybe if you're the only ship surrounded by 100 enemy ships and there is no hope of being taken prisoner or escaping. even then all you are doing is taking a cowards way out.
Long and short, No Captain would ever use ramming speed, if there was any hope of victory in some other manner, ever.
Ramming speed is not OP by any means. If you think it is, you should understand how it works first. Damage is based on Attacker's Hull vs Target's Hull. Shields mitigate this damage significantly, so it's really most effective once facing shields are down. The reason Cruisers are most adept with this skill isn't just because they have more HP to recover after the initial impact, but because they can do the most damage with it.
Yes I play a Cruiser, and yes I've rammed my fair share of Klingons in PVP, but out of dozens of rams, I can only ever recall one OHKO with it. Usually it's my torpedo volley and beam overload immediately after that does the trick. Furthermore, pilots in agile ships such as BoPs have no business complaining that a ship with incredibly low turning capacity rammed them to death. It's insulting. I'm not going to pull the "L2P" card here, but if you can't kite a cruiser in a BoP, you are doing something terribly wrong. Too often in PVP I've seen the agile ships just position themselves and fire in place. These players are easy targets for a ram or a strafing run, and they'll receive no sympathy from me.
Players need to learn to adapt to skills, and not ask for skills to adapt to them. Feedback needs to be based more in fact than opinion.
Edit: I might add as a note that attempting to ram a +3 Terran Federation Ship (forget the name offhand, but it's the rough equivalent of a Romulan Scimitar Dreadnought) from full hull on both ends resulted in instant death for me, and a whopping 8% damage to it. The target ship is fairly godlike, but this illustrates that by no means is Ramming Speed OP.
There is definitely something wrong with this skill. The other day someone was 1 shotting the crystaline entity before anyone could even get a shot off on it! Yeah that made the fleet action very fun, the leader board having 1 person with any damage. >.<