Creating A Custom (SHORTER & NOT 7s) Format!

Hello!
I know this is a stretch, but I was looking for honest opinions from other Blood Bowl players; with a bit of experience under their belts.

I myself, come from BB2 on 360. I got my friends into it, started up a league at my personally owned shop, and then interest slowly died off; mostly due to how long/stall-y the game felt.

Coming back post 2020, which I didn't play much, felt like steps in the right direction; while also ruining aspects other aspects of the game. (Feels like 40k again)

On that note, I decided to make my own variant.

I'm thinking of following the BB5/4 style, the 7s style, and hopefully not messing with the roster/pre-existing boards all that much.
That last point is important, the remnants of my league are VERY much opposed to changing fundamentals; as they don't want to learn a whole new game.

Introducing my take, a mix of 5/4 & 7s logic.

Attackers/Recievers get 5 turns per Quarter
Defenders/Kickers get 4 turns per Quarter in response
Scoring ends the Quarter
RRolls reset during Half-Time

On a base game board;;
Pitch size has 3 columns cut off each side for larger TouchDown zones
AND
1 row per side on Wide Zones

Shrink the board for a shorter game, while keeping the old boards usable

TLDR;;
Is there any obvious cheese or hiccups with this field & these rulings?

(Excuse my drawing, but for visual)

Sources :
https://bbtactics.com/bb54/
https://hullsangels.com/wp-content/uploads/2025/11/Blood_Bowl_Sevens_2025_Edition.pdf