Please allow melee Ranged Attacks to not interrupt/break combos!

[Ultimatecalibur]

That would only exacerbate the problem. Only a very select few fights warrant enough downtime a full three tier combo would ever be used. And since you'd still be breaking the single target variant, it'd essentially be the same problem but now with unnecessary button bloat. There is no need to add one or two more buttons to what is intended to be a very situational occurrence. Simply buffing the Melee range abilities and making them no longer break your combo solves the problem.

I think there are far more situations than you give the game credit for. If you actually think about it, this is what is currently happening:

1. Mechanic that forces the melee jobs to disengage is telegraphed.
2. Melee starts combo.
3. Melee hits second step of combo (possible)
4. Melee uses gap opener
5. Mechanic goes off
6. Melee uses Ranged weaponskill (combo interrupted)
7. Melee uses gap closer

The interruptions are happening completely due to melee dps and tanks being greedy and trying to get in just one or two more gcds in before they move which causes the ranged weaponskill to interrupt the combo that they left incomplete. With a 3 step combo moving early would not be as much of a penalty as this becomes the "safe" strategy:

1. Mechanic that forces the melee jobs to disengage is telegraphed.
2. Melee uses gap opener
3. Melee starts ranged combo.
4. Melee hits second step of ranged combo
5. Mechanic goes off
6. Melee finishes ranged combo
7. Melee uses gap closer

As for how to counter button bloat, 4 words: one button ranged combos.