The state of toplane is much more entertaining imo than the days where Maokai ruled. Pure utility tanks have no place in toplane anymore. I cannot see him returning firmly to toplane any time soon, but he almost has everything he needs to be a great support! I love the big tree man and I think he'd be a welcome addition to support tank pool!
All we need are some partial rework ideas to help this happen. Currently my thoughts are the following:
1. QoL improvements for his E to make it a better vision tool. Love the idea of his viability coming somewhat from having his little brush sentries :D
2. Put some damage redirect into his kit, callback to his old ult.
3. Give Q something cool, maybe it could reduce damage dealt on targets it hits.
4. Maybe his passive could heal a little to nearby allies.
Please let me know what you think and if you have any more ideas. Or if you think I'm wrong and a complete idiot, please tell me why. :)
EDIT: Just thought maybe helping his jungling could also be a decent option, but we already have one jungle tree man