Hmm...that all depends.

There's no such thing as too much power, but it shouldnt be done at the cost of flight performance.

There's a fine balance between weight and power on electric aircraft.

More power usually requires more weight due to a heavier motor. More weight will make the plane faster and have more vertical, but the plane is harder to slow down, and wont remain stable at slower speeds.

Lighter planes will slow down and be stable at slow speeds, but dont have the speed that the heavier planes do, and wont be able to cut into the wind as easily.

If your flying indoors...GO LIGHT...as light as you can get it. Everything you do building it, should be done as lightly as possible. Light weight glues, carbon fiber, Tape the top of the control surfaces, and just a few strips on the bottom. Shorten all wires. Use light weight servos, use light weight 2 cell lipos, etc. Move the CG a tad aft for good 3D performance.

If your flying outside. Slap a huge motor on it, dont worry to much about weight. Use thick foam, sturdy durable servos, and a nice 3cell lipo. Then find a BIG field to fly in and let er rip.

For indoor flight, with planes up to 8oz the 2204/54 should work fine. Once you hit 9oz, its time to look for something a little bigger. Like a 2208 or something.

Outdoor...hmmm depends on what the plane weighs.