There is little point to argue if the "rush to final tier" is happening or not, it is happening.
This is factually incorrect. In the current meta LVs are very popular. You can't rush for a final tier and spend fuel on LVs at the same time. That's not how rushing works.
Take the mobilize reserves upgrade in ver 3 for instance it was buffed and move to T3 as a sidetech. Then the mod team decided it should stay buffed and come for free at T4 not because it would not work in T3 but because they wanted to people to rush T4.
The idea was probably to give the player the option between going T70 or going for earlier upgraded infantry. You still have not explained why giving players and option of rushing high tech is a bad thing.
If people prefer that tech choice are meaningful I would suggest to stop the "final tier rush" mentality and make other tech option viable strategy.
Other tech choices are viable. Nobody is skipping over LVs in 1v1. The exception perhaps being 4v4s, which I honestly think is fine since it simulates bigger battles which would have more heavier equipment involved.