Why would I want Dex or Constitution though when I am in Wild Shape from the start of combat till the end?
Well that's the thing.
BG3 enables this freely, because you can replenish your Wild Shape charges ridiculously easily, so you always have 2 charges available and can spend all day Wild Shaped if you want.
Following the actual ruleset from DnD, you're more limited. Given the limit of 2 short rests per day and one long rest at night. That gives you only 6 uses of Wild Shape per day (At least until 20th level when you gain unlimited access to Wild Shapes). In addition you're only able to stay in a Wild Shape for a number of hours equal to half your Druid level.
Thus, outside of the specific design of BG3, it's more likely that you will not be in Wild Shape from the start of combat until the end. You are likely to have encounters where you simply don't have access to Wild Shapes or choose not to use a Wild Shape in order to leave the option open at a later time.
I think I have a different mindset of what Circle of the Moon is compared to what it was meant to be, similar to how they did with Druids in old school WoW. I see them as Forms with a little bit of caster thrown in while other see them as caster with a little bit of forms thrown in.
Aye, DnD Druid is a little different to Feral (And now Guardian) Druids from WoW.
DnD Druid is primarily a caster, that gets access to forms (At 18th level they even get access to spell casting while Wild Shaped)
While Feral/Guardian Druids in WoW are primarily shapeshifters that have a few spells (With old school Feral boosting both Bear and Cat forms making them incredibly flexible by allowing them to shift between the 2 at will with them being fully powered... Which is one of the reasons why Bear ended up being split off into the Guardian specialization)
Even with Circle of the Moon's focus towards boosting Wild Shapes, the Druid is still overall primarily a caster. (Though they can be pretty devastating shifters at 20th level, with unlimited Wild Shape uses and the ability to shift as a Bonus action, you can do some crazy shenanigans, much like the old school WoW Druids only with FAR more options)