I remember this. It's more powerful than an unspecialized wizard, but clearly not as powerful as a specialist. Demonstrates quite clearly that specialists are more powerful than generalist wizards.
I always wanted to play a domain wizard with a "rainbow domain":
1st: Color Spray
2nd: Rainbow Beam
3rd: Rainbow Blast
4th: Rainbow Pattern
5th: Prismatic Ray
6th: ???
7th: Prismatic Spray
8th: Prismatic Wall
9th: ???
I used to know the 6th and 9th level spells that would fit in there but I forget at the moment what they were.