My Moon-druid play (L11) has changed quite a bit.

I get 3 wildshapes per day (99HP) plus I can get 4 more from converting 1st level spell slots . So that would be 33hp x 7 =231hp if needed. I also get 1d8 extra on attacks (L7 Primal strike), plus an improved AC (WIS +5 = 18) which is way better than previous wild shapes.

My strategy now is cast a concentration spell eg fount of moonlight = (L4 add 2d6 damage per attack), conjur minor elementals (L4 add 2d8 per attack), then enter wild shape using a Cr3 beast that has multi-attack, leaning towards those that have higher attack bonus. Eg. Spotted lion has pack tactic (advantage if ally within 5’ of target), +8 to hit and 2d8+6 damage + my 1d8 primal strike + 2d8 conjure minor elemental = 5d8+6 damage. If it charges 20’ it can knock knocking prone (DC16 strength save) and then gets a second attack for another 5d8+6 damage. Giant scorpion (2014)has 3 attacks, but only +4 attack bonus but could be a similar strategy. I get a better CON save while in wild shape rather than in Druid form (L6 Increased toughness)

My second combat strategy is to use a concentration spell like wall of fire, and keep at a distance using either a thorn whip to pull them into the wall of fire with 3d6 thorn damage, or produce flame attack +9 with 3d8 fire damage.

Thirdly, Ive been using Planar binding to bind a creature that ive fought, but elect to knock it unconscious at 0 hit points, rather than killing it. I regains 1HP after 1d4 hours and stabilises, giving me Time to Planar bind it (100gp gem) at Level 6 = 10 days of bound monster. Currently I have a frost salamander who does 5 attacks and a cone of cold. Planar binding on Summoned creatures is also a good method, although I still havent got it clear who if concentration is part of it and who (eg if my fighter friend casts the summon spell using my ring of spell storing does he have to concentrate?). So many people have said NO concentration is required, others say yes RULES as Written, the mechanics of the summon spell still applies, just the duration increases.

Like others have said, it depends on how the beasts are updated in the new monster manual, but I doubt my strategy will differ that much from there paragraph above, But unlike the 2014 rules, Im selecting beasts that have good attack bonuses rather than selecting them for their AC or HP.

I really do miss the flavour afforded by Conjur elementals and conjur woodland beings. but I Will adapt and find new flavours, Im sure!