Hey there. I wish to speedrun this game with a friend and we plan to do SJL InB. The InB route that shows on the main leaderboards has slidejumps and im not sure if there are skips or not that result because of the slidejumps. If we didn't do slidejumps, would it really change anything?

The whole game changes. Most routes get changed and things become a lot more difficult. Watch SJLess wr in category extensions compared to any% wr just to get a idea how much more different the entire game is. To route an Inbounds route without slide jumps will require more restrictions then even the current SJLess route has and would result in it being even harder.