Two-Hand Weapon Mastery damage gain (1490501) is a simple damage-gain buff similiar to IBW and not like Warrior/Scout Blood Arrow which boosts physical damage. So the overall suggestion would still be just 10% (209/190).
The new ISS easily added ~30% more overall damage. With my suggestion, Knight/Warlock would be still be stronger by around 18% (1.3/1.1).
Scruts are mostly useless unfortunately, until Orkham is ran randomly. Even if I post scrut you can say that the other dps died alot or suck. Also devs said in the past, that their action is not based on few people, but the majority of players. This also explains why mdps are strong, because 80% of mdps are newbs (no offense, just low level guilds tend to play mage because support is bad)
If possible, can you explain the observations made to justify the decisions above? Are you using usage statistics. Are you analyzing average scruts? I am genuinely curious.
As it is explained few times in past, if some class is too strong for you, it doesn't mean its as strong as it is to you for other raid setups. Analysis is done according to majority of end content (Dark Core) players and their instance attempts. Providing "balance" for every individual is impossible for us unless we create identical classes.
Greetings