Many of your replies are the same as your original assertions. For example,
You have still failed to justify why your original proposal (6 man crew) will lead to more use of the LEIG. You have not explained what the problems with the LEIG are, and why your proposal will solve these problems.
For example, if the problem is that LEIG has terrible accuracy. Giving it 6 men or 100 men won't make it hit anything any better, so this will not solve the problem.
If the problem is that LEIG costs too much, so that it comes out too late to make an impact compared to an early game mortar, then giving it 6 men won't fix the problem.
If the problem is that the LEIG is too easily flanked because of its short range, why not a range increase?
If the problem is that the LEIG dies too quickly to counter barrage fire, then your proposal may be perfect.
But unless you clearly state the problem with a certain unit or mechanic and explain why your proposal will fix this issue, nobody will understand your point of view and take you seriously. Including the relic balance team.
If they do listen.