Yeah...no. I have been collecting Bandai / Tamashii stuff for about 20 years in a variety of lines and I can tell you they don't care much about customer feedback. They're notorious for scale inconsistency within lines and it's been happening forever and it's not about to change. If Gotenks were to sell poorly because of a mass boycott due to scale issues, you know what they'd do? Remake a better Gotenks some time? No. They'd stop Buu Saga figures because obviously people want something else. I personally like this Gotenks, I don't find him that overscaled and I have poses already prepared for the TWO I ordered (gasp).
Let's not tell others what they should enjoy or not.
If you've ordered the Gotenks figure, I hope when you get it you'll be happy with it and the size won't bother you as much as it does now.