Personally i really like the last round format - both team drivers racing in both races sprint and feature. The sprint race could be slightly shorter in this case - 20 minutes cold be good and could only be a sort of qually race. The feature race could be longer on th other hand - long enough that pit stop not obligatory
could be necessary to get to the finish line or run faster with better rubber (i guess that could be from 45minutes to 1h or up)
Now the last round format could be done only because the number of praticipants got lower and it was possible to put both team drivers in to 1 server.
I was thinking maybe if using Brams leader board system (RDWTCC fe.) and 2 servers
for the teams would make sense.
Meaning top teams in server 1 and the rest in server 2 - promotion/relegation for teams respectively each round.
Scoring system would have to be modified but here i would propose the following : keep the individual reward scale with a spread for the higher places (fe.p1-30 points, p2 - 25 points etc.) and reward points to the last places on server 2. Now use that result only to calculate team results with a lower degree points spread:
fe. we have 16 teams - a team finished at P1 and P3 and accumulated 50 points = they got no.1 team result and the team gets 20 points.
The pros of such system would be:
A high chance that at least 1 server will be full. Quite a lot of flexibility in that matter to have the grids fill up as much as possible as the season goes on and things change. Either put everyone in to 1 server when there is little of them, spread the teams equally on both servers to have them not full but populated, it could be even possible to order grids of 3 driver per team - 2 servers would have room for 16 teams in such case. More driver for round could encourage drivers by giving them better chance for a drive.
If figured out well the scoring system should provide close competition all season not allowing anyone to run away with points too far AND allowing backmarkers to fight for their points - encouraging for everybody?
With 2 servers and a proper scoring system even the teams from server 2 have a chance to score more points than the guys from S1 (in theory they can be first if all S1 drivers dnf...)
Cons?
The scoring and relegation / promotion could be slightly complex and needs to be figured out (but after all thats just basic math
).
With 2 servers it is possible some sort of prequally will be required (time attack prequally seems worthless in this case, prequally race sounds good, having the order figured out based on the last season results is also possible)