I disagree. The ectoplasmic wyrmling has better stats than the Silver wyrmling (+4 in all physical stats, -2 Wis, -4 Cha), an obviously worse breath weapon and no Alternate Form, but way better movement options with a fast swimming speed and higher flying speed, and especially a planar travel ability. The astral Plane is great for scrying, buffing, for getting away, or for infiltrating enemy strongholds. If Silver got +1 with 7 RHD, I don't see why Ectoplasmic wouldn't get +0 with 8 RHD. Of course, -0 for all age categories above.