I would suggest a more subtle change. Bump them up one spell level. It will either make them less attractive and they probably won't be cast much, or they will still be cast in spite of the higher cost and your fears will have been justified.
Or as mentioned above, modify the mechanics slightly, TP only to somewhere you have been (and maybe even placed an invisible arcane mark cantrip, which could possibly be removed with a dispel magic). Perhaps you phase in and out like the star trek teleporter, over 5 rounds like wind walk. A minor change the retains the basic premis but reduces the tactic you hate.
In a recent campaing our DM raised haste to 4th level. It was only learned through a scroll for item creation purposes. On the other hand at the time the party had 3 casters, a spring attack person, a crossbow person, a duskblade (standard action to charge sword), an archer and one defensive fighter. So only the archer and the wimpy fighter would have benefited from the extra attacks. So, it's hard to tell if it would have been cast as much as in a group full of melee fighters and summoned monsters.