I think this is a very interesting topic so this is a very long post so please bear with me.
Having been a warrant officer pilot (Army) and now a commissioned pilot (Coast Guard) I have seem both sides and I do see a difference. I also see that in order to go from one way of operating to another will take a complete organizational change not just an arbitrary addition of 30 pilots.
The Army likes warrant officer for many reasons. Cheaper labor, and they don’t have a whole bunch of aviation officers competing for limited command slots.
The cheap labor: Many warrant officers resent the fact that they get paid less. They do the same job for less pay. It doesn’t start out that way, new warrants are just happy to be flying but as you grow older and more cynical you realize that these young LTs are making more than you and you have been doing the job for years.
The available officers: If the Army made all of their pilots officers, there would be more officers in aviation than any other branch and nobody in the Army wants that (except the aviators) because by law the Army is only authorized so many officers and those numbers would have to be pulled from other branches. The Army also has commands at very junior levels (O-3) and there just are not enough to go around so many would be left at the wayside early in their career and would not be competive for O-4 so you would lose your experience base. The other services do not have commands until much higher ranks and can accommodate a natural progression of an officer. Plus RLOs cost more.
So to get rid of warrant officers in the Army would be an institutional change.
To add warrant officer pilots into another service like the Navy is planning to do seems as if it will have some problems as well. Eventually, the same pay issues will arise as once the initial excitement of being able to fly wears off, these warrant officer pilots will realize they are just being paid less to do the same job and have no hope of upward mobility. Like Army Warrant Officers, many will not mind but there will be those that will. No matter what is said or done, they will be treated as second class citizens. The whole separate but equal thing. You are an equal when the wardroom needs money for the wardroom fund, but you are just a glorified enlisted man when other needs arise so the job is dumped on you.
Unlike the Army, the warrant officer will be the minority not the majority so he won’t have the backing of a crusty W-4 pilot who is willing to take that junior officer aside and explain how he is to treat warrant officers, especially once those pilots gain a lot of experience. Using the current Navy/Coast Guard system, a high flight time Warrant officer Aircraft Commander would still be a co-pilot to a low time O-2 Aircraft Commander. I see a lot of animosity that could arise from this.
I wish all of those that apply for the program good luck as with anything new there will be growing pains.