that alone would be a huge buff
you know why?
because thresh cannot get gold past midgame, people will nuke minions too fast that unlike melee champions that can kill full hp minions with face of the montain, thresh cannotot and has to wait for them to be low but it will be too late because your allies do not want to let you get gold
Additionally, Bandit gives more gold for melee champions
Additionally, Thresh would get the DOUBLE of what he has right now with
And to finish this, he would be able to proc grasp's full effect from 450 range, which would be beyond stupidity, he would be able to sustain in lane forever, get more hp from poking, and dealing more damage in 2v2 and teamfights