Small changes that can go a long way for some champions

Increase Spider form E (Rappel) range to how it was before 4.13, or maybe slightly less than that. She would have way more options for unique ganks that would mean normal wards often wouldn't be enough.

While most people agree he is fine, I still see some people saying he is weak. Considering the nature of the champion, I would really like to see him be more defined as an assassin, and not a bruiser. One way to accomplish this would be to slightly increase his damage to the target of his ultimate. Making it a more defining "You're fucked" moment.

During his ult, his W gets double damage/heal values. Number could be changed to maybe one 50% more heal/damage. This way his ult makes him truly feel like he is going to massacre you, not just that he now floats.

Give her decent AD or AP scaling, like mediocre both. She was nerfed because DFG, that's been gone for awhile now, so she can get some help now.

Towers no longer prevent isolation with evolved Q.

Targets taunted by his ultimate take increased damage from all sources during the duration of the taunt. Galio's explode out would not do more damage, but his allies going ham would. This would further solidify his team fighting making him an absolute beast with a well played ultimate.

This has been suggested before, but I'll throw it in here. Make him a manaless champion. His axes would go off of a charge (think Akali ultimate), and picking one up decreases the cooldown (like it does now). The only other thing changed then would be his W not taking mana, which already takes almost none, so it doesn't matter. His E would cost HP still and his ultimate would be unchanged.

Just some relatively small changes that could immensely help champions, without making them downright broken.