A little more pass rush, even with Phillips getting better in his second year, would be welcome. Hopefully teams will be having to pass more to keep up with the Dolphin's offense, so Ingram would be great as the older pass rush specialist.
Not saying Ogbah and the coaches aren't capable of doing it but man Ingram would bring a nice wealth of experience to help Phillips keep the wave of progression going.
Yeah, football is a dynamic game and balance is key in a lot of areas. Having Ingram, Ogbah and Phillips on the outside is going to create frequent pressures for one of them (or more). Would love to land either Ingram or Foster to make Phillips' production jump.
I look at what players like Jason Taylor and Cam Wake did in the tail ends of their careers when they were technically past their prime- they were still huge contributors on 3rd downs. Plus like you said, what they add to the locker room and the young talent. So I'd be all for this even if he only gets 10 snaps per game- the experience and knowledge he brings is invaluable.