It seems ridiculous to you because you're used to the current rules.
1- Offside rule didn't always exist, but I don't agree with him in this specific case. However, the goalkeeper version of the offside rule is ridiculous though. Also, maybe offside rule should be less strict, like give a 2 meter or less distance offside rule. The main purpose of the offside rule is to restrict offensive players from just sitting far up the field, which can be achieved without being so strict.
2- This is definitely better than a penalty. Penalties are completely unlike anything in the game, they're very unnatural and don't really describe a player's ability that well. Also there is the notion that they rely on luck. 25 meter 1v1 seems better.
3- What does the orange card do? If it just suspends them for this match (like in basketball) then I'm all for it. Though 6 or maybe 7 fouls is more reasonable as you can easily commit 5 fouls in 90 mins.
4- Again this seems to be linked to basketball. This might be good as players won't be playing for a ridiculous 45 mins without rest. Football might gain quality because the players wouldn't be as tired. Other debates talk about how the football field is too big (you ever tried paying on an official football field?). Some say the field should be made smaller so we can have more action.
5- I think this is just so that players wouldn't get too exhausted from playing 60 games (or maybe more) a season.
Overall, the game hasn't had rule changes for a very long time and is possibly becoming stale. Rules have changed in the past and they can change now. It might be better for the game in the long run.
FIFA technical director Marco van Basten has floated a radical blueprint for the future of football which would see offside abolished and sin-bins introduced.
So, what exactly is this guy smoking?