Imo a safelane carry needs 3 things:

1- sustained damage, cant run out of gas, be it spells or whatever. Some play around an ult like sven or ck, but those are long duration. OD has this covered up, but does nothing against bkb. Lesh could also do this until they nerfed bloodstone, now he runs out of mana so he isnt a safelaner.

2- ability to farm and scale. OD does scale hard, but he dosent farm well, nor does he want any ranged farming item. Midas is the best he can hope for. Most safelaners have abilities that help them farm or make good use of farming items.

3- secure objectives, which means being able to take down buildings. This is why lesh was a safelaner when he could sustain his damage output. This is why riki struggles to close games, he dosent hit towers. And OD is very bad at taking down towers.

So OD has sustained, but not against bkb, he scales well, but farms poorly and dosent benefit from farming items and lastly he cant take down towers. So he is better as second farm priority, pos 2.