I really think these torpedoes need to be looked at. Having tested them in the last few days maxing them out they fall behind all others by miles. This is how I suggest you fix them:
Make their damage equal to a photon torpedo since they already have a longer CD. Then instead of the 20% extra penetration add this to the effects instead. "Has 2.5% chance to completly bypass shields.
Right now these torpedoes are useless and its not really surprising that everyone uses quantums. All the other topedoes in fact (especially plasma) need the same loving. Especially because no way to obtain other types apart from drops.
I agree that they need to be fixed, however I don't agree with the 2.5% chance to proc bypassing shields. 2.5% is low enough on energy weapons which are used frequently (thus giving a greater chance by default).
If you think about those numbers, that means if you fire 100 torpedoes, which is not feasible in any pvp match, at best that means 3 of them will proc. If we want to go down your line of thinking, I think that the bare minimum that percentage should be is 10% (increased by rarity level).
Another idea to think about is creating a penetration amount to penetration percentage ratio. In other words, if you want a higher shield penetration %, then it should have a lesser chance to proc and vice versa. This would allow players flexibility to decide what's best for their playing style.
In the actual series, there are several instances in which the crew modified the explosive yield of a common torpedo. So this isn't beyond the pale of reasoning in the ST universe.
I used the percenatge purely to keep in line with the other procs as I wanted damage to equal a photon torpedo (with longer CD of course).
I agree with you that perhaps in PVP this will not be too effective but I merely took a stab at it. However I think penetration working as bleedthrough is not really a good idea. the whole point of a transphasic weapon is to go through the shields entirely (and explode right inside the hull if the Voyager finale is any indication).
What if the 2.5% also included an extra damage boost to reflect this? I fear however that this may turn photons into redundant warheads unless they get a special attribute too (like more raw damage vs shields).
T5 cruiser shield between 5-7k
presently a hy III strike by a transphasic max damage arround 8k. The 20% by pass of shields results in 1600 hull damage pluse the 10% bleed through shield 640 for a grand total of 2240 damage to the hull of targeted ship provide it has no armor or hull resistances active. Becaue of the 20% bypass of shields lt may not even drop the shield.
Hy III quantums if hit on full shields do approximatly 12k unmodified damage usually this resultis in total shield failure since most T5 cruisers shield strenght is between 5-7k you end up with 5k damage to the hull.
standard transphasic damage 2100 damage with 20% bypass to hull
resultant hull damage 420 pluse bleed through of 168 total hull damge 588 and shield damage of 1512
quantums 3750 bleed through damage 375 and 3375 to shields
given this information why on earth would you use transphasic torpedos at all hi yelds do actually less hull damage than an equivalent quantum with the same cool down.
The sad state is even if you push it 50% bypass a hy III quantum will still do more hull damage than a hy iii transphasic.
Totally agree that Transphasics are completely broken.
I mean, if you look at the Voyager season finale (as lame as it was), a single Transphasic torpedo took out a Borg Cube.
Now, obviously this wouldn't be the case now (at least with the Borg) since the technology was assimilated, but having a much higher Shield Penetration is a must. I was thinking of leaving the lower damage, but upping the Shield Penetration to anywhere from 50% to 80%.