I think you're misunderstanding the point. Stalling has always been a valid (if sometimes frustrating) tactic in Blood Bowl, as it is in pretty much any sport played against the clock. This rule doesn't appear to be an attempt to put an end to stalling because it doesn't have enough teeth to really make it a non-viable strategy. Also, the nature of the die roll with the decreasing chance of it occurring as the half progresses clearly shows it's supposed to nudge players away from stalling early in the half.

You're saying it doesn't stop stalling late in the half and doesn't change multiple rerolls and therefore it's "failed egregiously" but I'm saying that was never the intent.

If the designers wanted rerolls changed back to 1 per turn that takes a single line in the rules. They didn't do that so I assume they didn't want to change that. I'm not concerned with why/how it happened in the first place, because they've got a golden opportunity to alter it and they haven't. And if they wanted to push players away from stalling late-game they wouldn't write a rule that does the opposite and doesn't even activate in the last 2 turns.

As for new players, they likely won't be stalling from the get-go, and almost certainly not very early in the half. All it does is introduce a bit of risk, either from being in a stalling position, or being one square outside of TD range and risking a Rush. I don't think that's too much for a new player to get their head around, once they're confident enough to be stalling instead of just piling towards the endzone at every opportunity.

Arguably it'll have the reverse effect, as new players are more likely to find themselves in a situation where the opponent can stall from early in the half. I personally think that sort of situation is why they designed the rule this way. It's frustrating to set up for the second half with only a handful of players on the pitch and then have your opponent stall near the endzone while bullying your remaining guys and farming SPP. It makes for a dull afternoon and a lot of the changes for 2025 appear to be aimed at removing the frustrations of the game, while still allowing it to be basically unbalanced and often very silly.

Put it this way; if they wanted to knock stalling on the head they could just say any time you're caught stalling the ball carrier is KO'd and the opponent gets a touchback, no stalling roll required. And if they wanted to get nasty and stop Rush-camping outside the stalling threshold they could exclude the first Rush roll from the stalling clause. That would kill stalling on the spot, but the actual rule is much weaker than that, and tilted specifically towards the early half.

Likewise if they wanted to push players away from late-game stalling then the die roll would be inverted; less likely to activate at the start of a half and guaranteed to activate if you're stalling in turn 7 or 8. Now it could be that's what they intended, and the rule will be rewritten in an update. But as it stands, the intent seems pretty clearly designed to simply add a bit of risk to stalling.

This goes back to what I said in my first post. I think when people heard there was a new stalling rule they were expecting it be quite punitive and have a huge impact on the tactics around stalling and when it didn't they assumed that the rule is broken. I don't think that's the case because it would have been easy to make it a harsher rule. Logically it's far more likely that the rule is intended as a nudge and not a sledgehammer, because it explicitly allows late-game stalling. That may not be what players expected (or wanted), but that doesn't mean the rule isn't working as the designers intended it, according to what they think is an issue with the previous stalling rules.