i disagree as well. at the moment, items get scaled, the become less usefull for some heros as well as imbalanced for some others.

look at the damage bonus archivement. for a torchbarer this is at the moment not realy usefull, but for a rook its maybe not bad to have +10% damagebonus in lategame. but if you would start to scale the item like <current level> * 2% , this item will be still useless for a torchbarer but absolutely imbalanced on high-damage heros like the beast or the rook which could get over 500 bonusdamage ( i think even more...).

thats just a simple example. for items i dont think this is a good idea.

but in dota i ever missed a scaled damage on spellcaster-spells. in lategame nearly all of them get easily pwned by heros which do damage by attacking. their HP get that high, that a simple spell wont harm them enough. thats a point where i think a scaled damage is no bad idea. or prozentual damage, which has the problem to get imbalanced very fast...

No no. I meant, it would be downscaled now at level one, not upscaled for level 25. How it is now would be the level 25 power.

%s don't ever need scaling, because by their inherent nature, they scale. So I suggest that you say the average Demigod at 25 has 4000HP, then make it into 50% of base health over 10 sec, rather than a fixed value. Or whatever % you want. But virtually all damage and health should be used as a %, cause otherwise you get massive scale problems since the values of Demigods change a lot.