I was under the impression more expensive recruits were ultimately better than developed cheap ones due to higher starting stats and a higher likelihood of stars in good places. I think I brought it up in the official forums and that's sort of the answer I got, because I was otherwise questioning the purpose of higher character tiers.
Overall, it's just not intuitive. Hiring a very expensive recruit you're mostly buying gear and somewhat higher starting stats, but it can very well be a huge waste of cash. Someone recommended hiring Sellswords at some point, OK, will look into that, but why would I ever recruit a Hedge Knight or a Swordmaster unless I had literal boatloads of coin? For the higher tiers, I need either Tryouts to be more useful, or more guarantees that what I'm goddamn buying is actually worth it.
I'll admit it - the only savescumming I do is when hiring new dudes. It is just too annoying to get a completely useless one.
I've done this about three times in my current playthrough and got three shitty overpriced bros. Reloaded, of course. It's just stupid. Perhaps the "solution" is to take a glance at the gear you see they're carrying, guesstimate how much that goes for, subtract it from the hiring price and try to divine what the result means in actual skill. But that may well mean nothing, too. Why can't we just recruit naked bros? It'd be easier. On the wallet, at least.
Or just have the game clarify how much of the price is gear and how much is man...
Overall, yes, there's a need for more intuitiveness, better UX. I entirely get being abruptly beheaded by an unfortunate roll of dice, that's X-COM baby. But mercs shouldn't be able to BS through the interview like some BSy intern applying for an office job. I would imagine that to hire a fighter your life may well depend on, you'd thoroughly test them, not pay a part of their asking price to check whether they're fat and that's it.