Hi Sam,
Please specify how you would like to modify the offside rule. Right now, a player can remain offside as long as he does not interfere with play, interfere with an opponent or gain an advantage while in that position. For example, he is offside and a midfielder passes the ball to him while in that position, the flagman should rule an offside offense.
I too would like to see some relaxing of the offside rule, but not have the rule eliminated altogether. If the rule were relaxed, Cornell Glenn would be a perfect candidate to take advantage of this since he likes to lurk high up the field anyway.
Regarding subs, I think increasing the sub quota could produce some problems. Sometimes an inferior team can prevail as long as their players have a high level of fitness. We saw that happen during our last campaign where we were dominating El Salvador, only to see them get back in the game, because our players got tired.
I would argue to leave the substitution limits as they are and force coaches to focus on higher fitness levels for their players.
Please let me know what you think.