As someone who adores mages, can we get some sort of help

The mid season changes to tanks seem pretty neat, and I love the lower damage you're giving them riot! but all these new mr items, and the extra mr on old items, what are we gonna get in compensation? all we have is which cant be used on a few mages and since abyssal is a tank items now that option has been removed? and that combined with my runes 7.8+15+15+30% magic pen, its not THAT much, sure its enough to dent a tank, but I feel like as a mage, lets say someone like I should only need 2-4 combos to kill a tank, and with these mr items its gonna make that around 5-6. All I ask, is for liandrys to give like maybe 5+ magic pen and voidstaff to cost a little more and maybe give 5% extra too, I'm not a game developer so I cant provide good numbers to make it balanced, but I sure do play this game a lot, and I'm sure these changes will ruin mages if we get nothing inturn.

I know changing any of these items will affect champs like etc... but whenever I wanna play what I love, I don't wanna have to beg my jungler to pick up every game just so I can deal my damage. Anyways, this post will probably get downvoted to hell but I just wanted to get my shitty opinion out here :/

Edit: WOW people are dumb, I said AFTER THE TANK UPDATE, not right now, of course mages are fine rn