Well i see that you are new, so first lemme explain some things to expect when you join a clan.
When you join a clan, you will most likely be orginized with clan peeps. So the chances of being on an orginized ship is greater.
When you are in an orginized ship every role are split. Gunner does something, engineer does something, that other engineer does something and the pilot does something.
Here are the things that higher level usually do.
Engineers sometimes have the act of being full time engineering. So not much gunning for him if at all.
Engineers sometimes get responsibility to one or 2 components, while gunning. These are called Gunengineers.
Some engineers are responsible for Everything, buffing and repairing and Gunning. This is probably the hardest and most effective one to have. However you loose the ability for him to spot as he is in his limits.
All engineers and Gunners Spot for the pilot. So that the pilot has 3 helm tools. Engineers and gunners look around to spot enemy ships for the pilot so that the pilot can more easily be aware.
There are some engineer build where they trade a gun because of their ammo. Like on a goldfish with hwacha, 2 engineers are the same but they switch out on range. One holds heavy clip for hwacha in range, but the other one holds burst for hwacha in Close Range.
Engineers usualy have a clear vision for ship limitations. This is something i as a pilot learned alot about simply playing as engineers/Gunners.
For example, if you play Pilot for a while and feel all the benefits from having engineers/gunners, then you know what to GIVE to other pilots whenever you are engineer.
I love to play as
Some engineers are responsible for Everything, buffing and repairing and Gunning. This is probably the hardest and most effective one to have. However you loose the ability for him to spot as he is in his limits.
Because i like to relief the pilot with the buffs, and availability to gun. So that he expects a better working ship with a gun ready to fire constantly. etc etc.
Gunners can learn from being pilots. For example, not shooting directly on sight, but rather be aware if his own ship isnt moving too much and then fire.
While pilots learn on comfortability of the crew. Like if his build is way to demanding for the crew, he should switch out.
Now regarding your suggestion, it will potentialy sabotage the ship. There is a reason why a pilot is the captain, because he knows the ship, and thus in control of it. You mostly fulfill his requierments. But because of your timing as an engineer, you can make for a tanky ship.
Gunners have part timing, but mostly skill as their gameplay.
Pilots have experience + Mentality as their gameplay. (Or so imo)