I agree with many people in here in that I think the approach this proposal takes is not solving the underlying issue at all. Let's look into this bit by bit.
First of all enforcing a rule like this will promote bloating sets with filler difficulties. Can't rank you set because overall drain time is too short? Let's just add a Beginner and Advanced difficulty (which is not a lot of effort and something mappers will most likely do) and you are fine to go. We have kind of tried to avoid bloated spreads until now so this goes kind of against our current principles.
Second, in relation to my previous point, this will mostly punish mappers that care about having a well balanced spread on 30s songs they also might care about. If we take a map like the one that was linked in the OP for example, "low effort" things like this could still happen, just with 5 instead of 2 Easy difficulties. What you would actually achieve with a rule like this is that songs that have an actual target audience and therefore people who want to play them (e.g. short cartoon openings) that might not call for an Expert difficulty would either need a bloated spread or were not rankable at all, despite them adding reasonable content to the ranked section.
I think the issue we should actually be discussing instead are "lazy" cuts of songs that have long versions available or other edits of songs that are purposefully made to abuse the minimum drain time rule. Lanturn and I made an example some time ago of what could actually be done with the current ruleset (a map that's essentially just a stream) and things like this or minimum time cuts would not be stopped by a rule like this.
Also in case the rule should actually pass, 2:45 is ridiculous as it would not allow for actual E/N/H/I (which I consider full spreads) on 30s songs so the absolute maximum I'd go with a rule like this would be 2 minutes sharp.
Also strong +1 to Noffy
First of all enforcing a rule like this will promote bloating sets with filler difficulties. Can't rank you set because overall drain time is too short? Let's just add a Beginner and Advanced difficulty (which is not a lot of effort and something mappers will most likely do) and you are fine to go. We have kind of tried to avoid bloated spreads until now so this goes kind of against our current principles.
Second, in relation to my previous point, this will mostly punish mappers that care about having a well balanced spread on 30s songs they also might care about. If we take a map like the one that was linked in the OP for example, "low effort" things like this could still happen, just with 5 instead of 2 Easy difficulties. What you would actually achieve with a rule like this is that songs that have an actual target audience and therefore people who want to play them (e.g. short cartoon openings) that might not call for an Expert difficulty would either need a bloated spread or were not rankable at all, despite them adding reasonable content to the ranked section.
I think the issue we should actually be discussing instead are "lazy" cuts of songs that have long versions available or other edits of songs that are purposefully made to abuse the minimum drain time rule. Lanturn and I made an example some time ago of what could actually be done with the current ruleset (a map that's essentially just a stream) and things like this or minimum time cuts would not be stopped by a rule like this.
Also in case the rule should actually pass, 2:45 is ridiculous as it would not allow for actual E/N/H/I (which I consider full spreads) on 30s songs so the absolute maximum I'd go with a rule like this would be 2 minutes sharp.
Also strong +1 to Noffy