The potential fix would allow block template creators (e.g. mining pools) to have another 4000 WU worth of transactions; however, there is a risk that it could result in invalid blocks being created by those block template creators that do not account for the change (https://github.com/bitcoin/bitcoin/pull/31384#pullrequestreview-2489253785).
While I am sharing here, if you have comments I ask that you please respond within the delving thread to keep the conversation in one spot: