The strategic goal is to checkmate the king; capturing the queen is a tactic in the battle, not the outcome itself.
I understand what the stated grounds are. Regardless of what the lawsuit says, I think the teams couldn't care less about racing in other series, or buying other parts, or running on other tracks. The antitrust lawsuit is only a tool to reach the real goal, charter ownership. The teams are using the lawsuit to place NASCAR in a legally untenable position. They expect this will force NASCAR to settle out of court, with the teams gaining charter ownership as part of the settlement.
You apparently are taking the lawsuit's stated anti-trust issues at face value, with the goal of the lawsuit as to be able to create a series that competes with NASCAR. I don't think the teams are interested in that at all.