First off I really like the rules for making an Eidolon, I think their easy but allow a lot of customization. We tested them briefly, and like a few other groups after a little bit of time the player was mainly playing the Eidolon, not the Summoner.
A lot of players like Fighter/Wizards (aka Gish), they can go around a hit things on the head, but occasionally do incredible things like teleportation or shooting balls of fire. If a player had something like an Eidolon class they could pull that off without multi-classing and they'd get spell effects roughly at the same time as casters, they'd just have a lot fewer effects to get.
Eidolons also allow a great amount of customization for people with unusual character concepts. You could get flying Monks from 'Crouching Tiger, Hidden Dragon' or you could get a demonic my little pony that belched fireballs. Typing that I realize there's a great potential for silliness which is inappropriate for some groups, but the potential for an quasi-standardized set for creating house ruled player classes is just too enamoring (at least for me).
Whether an Eidolon+Summoner is to powerful or an Eidolon itself is stronger than a Fighter should be discussions for other threads, I'm interested in whether you could make interesting and appropriate characters using a similar rule set.
A lot of players like Fighter/Wizards (aka Gish), they can go around a hit things on the head, but occasionally do incredible things like teleportation or shooting balls of fire. If a player had something like an Eidolon class they could pull that off without multi-classing and they'd get spell effects roughly at the same time as casters, they'd just have a lot fewer effects to get.
I think what you are looking for is a point based classless system, Like true 20, and i really doubt we'll see Pathfinder headed that way anytime soon.
No, he's asking for a point-based class, which is completely different.
Honestly? I think you could just take the eidolon as written, give him a full HD progression, and be good to go.