Pekka level 4

This one has confused me, and I assume it was originally like this for balancing reasons but: level 4 pekka isn't available until TH10.

Now mostly at TH10, you get the final upgrade for a lot of units:
Level 7 barbs
Level 7 archers
Level 7 giants
Level 6 goblins
Level 6 wall breakers
Level 6 minions
Level 4 dragons
Level 6 wizards
Level 5 golems

For pekkas, you get access to level 4 AND level 5. However, at TH8 you can take them to level 3.

I think the level 4 upgrade for pekkas should be available at TH9. With the recent change to building hp, and earlier they added a fourth mortar and skeleton traps... I think access to level 4 pekkas is a good balance for TH9. At TH8 you get access to pekkas, and you can upgrade them twice. Then at TH9 you can't upgrade them at all, and then TH10 they are the ONLY unit you can upgrade twice.

Anyone else think it's a little wonky? Are level 4 pekkas really too powerful at TH9?