1. 15 inch range puts you in close so the next turn you are in kill zone range
So what, kill zone only applies to phasers, and Feds have better phaser suites than klingons.
2. @ 15 inch range you only have a 33% chance to damage the shields of a klingon player that
he will get to reduce by 50%
Actually it is a 16.7% chance of damaging shields, the other 16.7% ignores shields.
Again, so what. First off only klingons get the good front shields, against the majority of other empires that is irrelevant.
Secondly, as I explained before, the strength of photons is not their hit rate and shield hitting ability, it is their leak and crit delivery.
3. Klingons turn so fast you will always be facing the front arch
Are you only playing 1 vs 1 duels or other small games, in larger games this is not true.
4. You only have a 16.67% chance to penetrate the shields and then you need additional 6 to do any real damage.
You just need to roll over 1 to do real (non-repairable hull) damage. Klingons with their weaker hulls hurt when leaks come in.
You need a 6 followed by 4 chances to roll a crit, that is 52% chance of 1
or more devastating crits after you roll a leak.
5. You can't fire Photons in the next turn
Neither can plasma.
Photons do twice the all important hull and 4 times the crits levels as disrupters, that is why they fire half as often.
Go back and look at my other post. The balance is blindlingly obvious. Disrupters do the same leak hits, twice as much non-leak hits but half as much crits over a 2 turn cycle, That is pretty balanced. However, photons do their bang in one go, that is far better than spreading it over 2 turns. Shield hits are also easier to repair than crits, especially on a Fed who has the better shields and hence better boost shields action. That is compensated for by longer range on disrupters.
If you close the range to 7.5 then disrupters are relatively worse than photons, as the leaks and crit rate are exactly the same, but the photons double the shield hits where as the disrupters only gain a 50% increase.
7. If you do want to fire them it costs in power drain
No it doesn't. Where do you get that from?