Honestly, what's the point of the Rift Herald anymore?!
With how weak the towers are now, you can't afford NOT to take TP top lane(or even mid sometimes) because one death will pretty much guarantee them a tower. Also, having TP is even more effective because if you successfully kill the enemy bot lane(or mid) you can easily take 2 or more towers early. Which is insane.
The bottom lane gank party is even more prevalent in our games. There has been too many instances so far where the enemy mid and top ganks bot and push down to the inhibitor tower in one very fast push.
Rift Herald is supposed to be something you take when the enemy is away, so you'll be able to push down their lane really fast. However, the fact that you need to have your Jungler nearby to take it makes it impossible to use effectively.