The feat that allows you to wear heavy armour transferred it's +1 to strenght to your wildform in patch 8. So your bearform would max at 20 strenght. With the right armour (17) and shield (3), you would also have 20 AC unboosted.
Oh! It never even occurred to me to try Heavily Armoured as all the EA heavy armours are metal and except for a bit of experimentation I was trying to be good

. But I had a save just before level 4 and yes Heavily Armoured still boosts your wildshape strength in patch 9, giving your bear 20 and your wolf 18, with benefits to attack and damage (other animals have even STR stats to start, and some of course use DEX anyway). Plus as you say the extra AC of heavy armour would be handy for my druid in her squishy human form, even though I'd feel bad about using it unless we get some Ankheg Plate or similar. That makes this a potentially very attractive feat for moon druids, though I wish the description would make it clear the strength boost affected wildshapes too.
Assuming it is meant to? Do you know if this reflects how it works in 5e RAW?
I didn't know flaming sphere wasn't just a really bad fireball, though, so that's really good to have handy in patch 9!
I know! It felt like such a revelation.