From his interview with Chad Dukes at Chad Dukes Wrestling Show:
"Lenny Harris was a utility player for the [Cincinnati] Reds, he's on my favorite players because he literally played every position on every night he played a different position. First base, short stop, whatever, but he was a beloved guy because he was always there and could do anything. I think I'm one of the only guys here, I mean we have so much great talent here, but I can do anything. I can literally do anything. That's not me being like, 'oh I'm so great,' I'm just like. I know what I'm doing. I'm not some schmuck they just hired and threw down in the Performance Center and gave him an entrance or anything that like. I've been around enough and have enough experience, I know what I'm doing pretty much. I like to think I'm a good mechanic for the company. 'Oh well, we sprung a leak? Call Ambrose, throw him in there.' I like that because I think it has really upped my value with the company and I think that they realize nowadays too another Dean Ambrose isn't going to walk through the door anytime soon or ever. So. I kind of exist in my own little space, I kind of got my own little corner of the room carved out for myself which I like."
Reading that reminds me of the time Stephanie McMahon refereed to The Miz as a "utility player," which she used in a promo to say they send him anywhere as needed. Ambrose is closer to the term in the sporting sense, which is to say he can play any position and play it well. He can open the card in a ladder match for the Intercontinental championship and tear the house down with any number of opponents, or he can headline a pay-per-view (PPV) on two weeks notice when they decide to make it a Network special instead of a simple house show.
There is, of course, a ton of value in such a guy. Having said that, his being such a guy almost certainly lessens his chances of being THE guy, the flag bearer for the promotion. Maybe he's just fine with that, but is his fan base?