Boring units.
IMHO there is only two units which is unfun and i would like them be removed - tremor and badger. Every nub can spam them but counter them is hard. They are most boring units in game.
And in some cases funellweb with its shielding ability which can even block nuke in midair (however not its aoe). This shield is op in some cases even and in some cases funnelweb spamming lead to loss because shield eat much energy and team got less metal while they have big useless builder. Not even mentioning that one wub build funnel, comes to front, eat all your reclaim and build other one funnel. GG.
-Placeholder ability to hold striders is boring or even OP in some cases.
OP/strong units:
-Only true OP unit overall in this game at moment is cornea, iris and conjurer (cuz cloaking field). You can't see anything. Energy cost is average.
-Ultimatums is very strong, almost OP. Paladins is melted and detris too. One shoot and one kill most units. Deal even with raiders in many cases. Only thing i dislike is this large dmg vs paladins and detris. 4 shoots and paladin is ded. But overall cool unit because deleted problematic trollcoms with one shoot.
-Lance is OP but reasonable OP because hovers will be shit without it and its great counter for heavy unit. Maximums need small nerfs. Like larger metal cost. Lance OPness is only against limited units and it isn't spammer choice.
-Emissary is limited OP. Also hard counter. But problem is about that its very good vs other units even more then against porc.
-In some cases guardian trollcom is OP with its drones even in midgame but as not many spam them this isn't problem in many cases.
-Artemis still very strong even with metal drain. And in same case still too squishy. Hard to balance.
-Scythe is strong but no op. Maximum need larger energy requirement to operate cloak so enemy cant make 2 of them and just raze factory. That is most problematic thing about them that you can do it from start.
-BB is very powerfull in few cases but in many cases it can be easely countered.
-Welder. 2k hp and 7,5 bp for 200 euros? Very nice price. And plus it have even attack for dealing with pesky raiders.
-Widow is strong (not OP) but its balanced with no attack and high energy upkeep.
-Limpet. Only few player have discovered how OP is this unit. Maybe even second to cloaker units.
-Phantom is strong. Agree. But it must be in.
-Snitch. Very powerful unit. But only in right hands. I'm so glad that there is only few such hands in ZK. Best scythe counter in game.
Shit/bad units:
-Athena is problematic because low level player spam them and it tend to be just big metal invest without real use. As factory its alsmsot useless except cornea + djinn trolling. As rezzing unit it doesn't make cost in most cases. 95% games useless trolling.
-Lucifer is 95% lubtrap in games which can be destroyed by single skuttle or impaler spam. It doesn't give many contributions in team games. And you need 50 energy grid.
-Detriment useless shit. One of most fuking useless unit in ZK and entire RTS gaming history. Only some units like limpet drone from Tiberian sun and brute from RA2 is more useless. To use it you need equal cost in metal in supporting units. Better two paladins or supweapon or just merlins in cost terms. It detriment for own team not enemy.
-In most cases dante. On paper its uber unit but in practice become problematic. Lance deletes it, ultimatum one shoot - one kill, most arty punishes it, two spy stun it. There is many players who spam it but only few who have mastered this awesome grill machine. However dante is hard to be balanced. Most cases this unit is great metal delivery.
-Balstwing - almost useless unit.
-Reef. Maybe second most useless unit after detri. 3000 cost for big ship with glass drones, metal costing disarm missile and three worthless airpad which do more harm then benefit.
-Hacksaw. Too limited use.
-Paladin. More medicore then bad still. Its big gun doesn't give big advantages in pitched battles. Nor also its stun guns. This unit is easy countered by ultimatums and other heavy units or you need enormous cover for it. Two scorpions also cook it. As skirmisher its useless. Only usable as assault team leading tank and worthless vs dense porc but still way better the detriment.
-Thug. Slow meathield and nothing more. Can be blowed up by snitch, stunned by imps, cooked by raiders.
-Mason. Very medicore builder with low build power.
-Crane. We all know that crane air is OP. Almost everyone who have played with planes seriously.
I will not add skuttle in bad unit lists. It have shit decloak range but it high dmg and jump is still strong thing. In right hands it can mean gruesome death to enemy coms.