Is there any plans for creating IRR route objects in ARIN in the future?
ARIN does not run an RPSL-style database (unless that's changed recently) so has no concept of a "route object" the way that you are thinking of it.
Some large providers operate their own RPSL-style database that they use to build policy for their routers out of. That makes quite a lot of sense once your network is big enough that you can't just use a text file, and it doesn't rely on anyone external to operate your database for you. You are free to have your own view of the world.
It's a very different culture than what we have in RIPE-land. I agree with John that this lack of centralisation made possible, the proliferation of the Internet early on.
Nowadays, in normal circumstances, we're not so much concerned with the proliferation of the Internet, in many places it's saturated. The industry has consolidated itself to a large extent.
However, in disaster or crisis situations, you need agility. Sometimes you have to do things that were not forseen when the centralised synoptic view of the world was created. Especially for amateur radio operations it is crucially important not to hem ourselves in when we are needed most.
This means not documenting ourselves in databases in an inflexible way that will be believed over the reality on the ground and restrict our ability to work. Speaking from personal experience in disasters and crises, it can cost lives.
There is also the RADB which attempt({s?,ed?}) to be a place where people can publish their route objects and intended policies. Nobody trusts it because anybody can put anything in it and corrections are handled reactively after the fact.
Best, -w