[Yes] Item 1: Cutscene Skipping [Yes] Item 2: Sewer Skip Patch [Yes] Item 3: Input Viewer [Yes] Item 4: Kill Combo [Yes] Item 5: Music Mute
Yeah, it strikes me as the kind of thing you do to make heli skip doable, not a thing that matters in runs (Yet)
A common concern regarding option B, voiced by @suprix above, is that skipping cut scenes may result in timing inconsistencies due to the technology not being sufficiently developed. [b]The main idea of option 2 is to allow people with modded xboxes to skip cutscenes without [/b], therefore, in the event option 2 is passed, runs with the cutscene skipping would not be valid until it is demonstrated that cut scene skipping with the IGT setup and adding the time back consistently results in the same time one would have gotten if they had watched the cutscenes, which is in progress. (I agree that "time of run + (total cutscene runtime of proper language - amount of cutscenes watched) = leaderboard time" is a good solution).
Regardless if IGT or RTA is used, or if cutscenes are skippable, a modded xbox is absolutely required to be competitive at the game to be able to play on JP with Sewer Skip due to region locking as stated above. Therefore, the only new "modded privilege" that would be added would be the fact that vanilla players must sit through cutscenes while modded players do not. That said, competitive runners (who must have a modded xbox by definition), must watch more cutscenes overall than less active runners, who are less likely to have a modded xbox, simply because they are doing more runs. Skipping cutscenes would allow modded runners to speed run more effectively, with less down time and punishing resets, and collectively save time. That is not to say that unprivileged vanilla xbox / 360 runners aren't/can't be serious about the game or do many runs, but having a "good time" unfortunately has a pay gate due to the nonsensical practices of region locking, etc.
In the end, my reasoning is that I don't want to sit through the cutscenes and waste time, and since technology has enabled us to likely be able to skip them without impacting the final time of the run, why disallow it?