It's something we have kept an eye on, but so long as people who are building Death's Toll, Leather Cowl, and Ornate succeed (outside of top level player most people build these and succeed, with Ornate being a bit underwhelming) the flexibility is cool.
Warrior's Axe was hit mostly because it led to a lot of play pattern frustration. Trading some stats for stronger jungle control near the lane with Bumba's feels like an interesting tradeoff, and I see why top level values it.
That strategy does become weaker as a whole with this patch, so in theory reasons for doing it are also going down compared to the more standard starters.
Another reason for buffing them would be to just bring up carries as a whole, but as a role they seem to be doing OK. So yeah, we could buff them but the urgency for that doesn't seem super high.