That means that they're better than spheres.
That's a very interesting point.
I'd say that a single combat feat is worth about.... advanced access, or basic access if you're a Conduit with 'advanced' sphere access, that is, every 'lower' level spell has +1 more use than the previous level.
Getting about 3/day level appropriate; or 1/day appropriate and +bunch/ a few levels down abilities is roughly the amount of power that the average combat feat could give you.
If you pick up Heighten Spell Like ability from ToF; then
all of the SLAs you have are level appropriate in terms of DCs.
Supposedly, a conduit with a different Sphere every other level, is going to be on par with a character who got combat feats instead. Supposedly.
The problem with just handing out combat feats like hot dogs is that you get builds with Blindfighting, Juggernaut, and Hordebreaker; and the player always carries a torch, doesn't grapple, and only attacks single targets whenever possible.
It also means that you can see a build with TWF, Stealthy and PBS; that throws darts for beaucoup damage, and doesn't bother tangling with melee.
Handing out combat feats makes people either really sloppy, and fail, or they tweak out, and that leads to (in
some games, with
certain groups) an other sort of fail.
Really, it's like playing with a person who you've never seen before, and they play a wizard.
They could cast Magic Missile.
They could cast Enlarge Person.
They could cast Cone of Cold.
They could cast Magic Jar.
You really don't know what's going to happen, until it does, and you can be disappointed with the results no matter which is chosen. Either because they suck, or because they suddenly made you smaller in the pants.
I think that the RoW fighter might be best used when everyone at the table is able to only pick that class instead of the other RoW martial classes.
Even with everyone playing the 'same' class, you will very unlikely see any two characters with the same set of abilities.
Since wizards are the balance point of the SAME game test; and the RoW fighter was meant to be the martial equivalent of the Wizard, that would help keep things in the game more 'basic', but still allow a lot of inter-PC variety. Some days, 'infinite classes' gets to be tedious.
You have to spend three spheres to get an at will level appropriate ability.
Remember Heighten SLA from ToF. It makes all of your Sphere SLAs level appropriate; and at that point broad-basing becomes much more viable, since all of your SLA DCs are the 'highest' possible at all times.