if you want demigods to become a competative game then this is a must. if you don't like the rules then don't play with them, this isn't rocket science people.
No, it's really not. DG would become most competitive with automated matchmaking, in which case all house rules would be completely unenforcable and off the table.
The things that are proposed to be forbidden here are all bugs, and bug fixes are devs' concern, not the players.' I know I sound really cynical right now, but the bottom line is that these kinds of rulesets never really work out because it reduces the community to an uncompetitive size and using every last trick in the book is what it means to play competitively. Glitch combos on fighting games, homogenous armies on RTSs, drink bugging on WoW, and many other things are examples of either bugs or unintended gameplay which are or were used in competitive play.
The only reason why house rules even seem feasible is because of how flawed and small the community is. If it grows these rules will become completely impractical and there's no aspect of the ladder which shows how nicely or fairly people played.