So he's complaining that D&D cuts him down to MERELY six unique actions per combat.
My heart bleeds.
Level one is ~2.3 unique actions per round. 2 At Wills plus 1 Encounter (0.125 actions per round in a 8 round encounter) plus maybe a racial encounter and a daily (0.025 actions with 5 encounters per day, 8 rounds per encounter).
Level seven is only slightly better at ~2.6 unique actions per round. 2 At Wills plus 3 Encounter (0.375 actions per round in a 8 round encounter) plus maybe a racial encounter and 4 dailies (0.025 actions with 5 encounters per day, 8 rounds per encounter). Maybe a little more with magic items.
More or less, the player has a choice of basically 3 things to do on an average round and 2 of those are the same two over and over again.
Hold me back.

3 whooping choices.
Once the PC's encounter attack power is used at first level, he is down to 2 actions At Will Power #1 or At Will Power #2. Sure a few classes can charge or some such, but that too is extremely limited. Grab? Doesn't happen because escape is so easy. Trip? Doesn't exist.
The game has dummied down to "Use At Will power #1 or Use At Will power #2" for the vast majority of rounds in levels 1 through 5+. All spell casters feel like Fighters.
So, I cannot help it that this is sufficent for you. Some people enjoy more complex tactical interactions than which one of three actions to do this round. Even MtG has more choices than that.
Note: Before the plethora of "they have a lot of choices" posts show up, Encounter and Daily powers are extremely limited. Either they are not used in order to save them (not much choice there), or they are used and are no longer available. Either way, they are extremely limited choices and not used in the majority of rounds. The majority of rounds are At Will #1 or At Will #2. Sorcerers and Psions could mix and match a lot of powers. Not just the same two over and over again.
Also, there are other issues for him than just the number of different type actions.
There are virtually no spell durations in 4E. For some people who enjoyed buffing their PCs, that's gone. Forget it. The vast majority of buffs last until the end of the PC's next turn.
Illusions? Nope. Summoning that's worthwhile? Nope. Scrolls to backfill spells and allow for more choices? Nope.
The game used to feel personal. Now it feels a lot more like Monopoly. A set of mechanical rules. Limited choices. Limited durations. Limited spells. Not much difference between magic and martial. It feels more like a board game now. Even Dragons are now just big damage machine brutes. No magic.
A lot of the choices and flavor is gone.
Just because that is sufficient for some people does not mean that it's sufficient for everyone. And, rightfully so.
So, go bleed somewhere else.