only now you can't farm it because you have no base damage, so jungling, clearing ancients, roshing, and split pushing are all completely impossible.
Sorry, man, but you're talking shit here. If you haven't noticed it, it wasn't a simple exchange of Huskar's damage for magic resist - he also gained a significantly larger IAS gain in the process. Let's do some math.
Old Huskar, 1st level. 3 ias per stack, 2 damage per stack. Let's say, 5 stacks. Starting items - 2 gauntlets, 2 branches, regen. So his damage output is 43,5 base + 10 from stacks + 8 from items - 61,5. Basic ias - 0,22. Now, what's his damage output? ((1+0,15+0,22)/1,6)*61,5=52,6 damage per second.
New huskar, 2nd level. 8 ias per stack, no dmg, same 5 stacks, same starting items. Damage output of ((1+0,4+0,22)/1,6)*51,5=52,14 damage per second. Fucking bitches, stealing huskar's damage!
But ok, ok, it's lvl 1, it doesn't really count. Let's take level 7. You've gained 14 natural strength and agility, then 4 strength and agility from putting 2 skill points into stats. In terms of items you have, let's say, threads and a pair of bracers, that's 20 strength gained, 6 agility and +6 damage. 30 ias from threads too. That's 87,5 damage and 74 ias. Blood is obviously maxed. Let's count it for the same 5 stacks:
Old huskie, 12 ias & 8 dmg per stack: ((1+0,74+0,6)/1,6)*(87,5+40)=186,4 dmg per second.
New huskie, 20 ias per stack: ((1+0,74 +1)/1.6)*87.5=149,8 dmg per second.
Yeah, that's a loss, I'll give you that. Old one has 25% more dmg at this point. However, what if there's a fucking Luna on the team? Say, lunar blessing lvl 3.
Old: ((1+0,74+0,6)/1,6)*(87,5+40+30)= 230 dmg per second.
New: ((1+0,74 +1)/1.6)*(87.5+30)= 201 dmg per second.
So new also loses, but suddenly, it's only a 14% more damage. Because, unlike with simple damage bonus, IAS bonus actually scales and gets better with each level and item you acquire, so while I'm too lazy to do more math, I'm sure that the new huskie doesn't lose much in the early & mid-game (compared to old one) and is much, much better in late.
And you can't just say that magic resistance means shit - by that logic, Morph (who has no resistance, but sudden strength gain, which is basically same shit - more spells absorbed) also needs to go bkb else he's stunned & killed before he can morph, but all the good morphs went linken's(and that's what modern huskars may do, btw, especially with linken's buff).