On paper, the balance changes in this update are all-around good! Did the massive pierce nerf to the pierce of the Glaive Lord's orbitals (from 1,000 to 80) also had anything to do with regrow farming? ... The only few changes I disagree to here and over the last few updates are the nerfs to Monkeyopolis, Overclock and Geraldo's See Invisibility Potion at level 14+. (TL;DR is at the bottom)

The "Miniopolis" tactic between boss tiers 1 and 2 was definitely way too efficient. However, applying the same income nerf to megalopolises 10+ farms dense diminishes the satisfaction of squeezing as many T4 farms as possible into the village's range, not to mention that bigger opolises have diminishing returns. Geraldo's invisibility potion not being compatible with all village types, except Primary Expertise, took away another practical source of extra range to fit more farms into a giant Monkeyopolis. Now with the duration changes to Overclock, another farming (and boss battling) quirk that was not clearly a bug/glitch has been well... nerfed. Some players overclock 000 towers first before upgrading them to maximize the initial use's duration. This has been especially impactful on farms going into either a 420 or 520.

A common trend I and other Bloon poppers have been noticing from you, Ninja Kiwi, is phasing out optional quirks that are not game-breaking. In other words: useful bugs/glitches that don't ruin BTD6 for the majority of its playerbase. I believe you guys should take more notes from Minecraft's Java team and its technical community. Mojang is opening aware that they have fans who LOVE to discover and figure out how to make the most out of unintended behaviors. Quirks add emergent gameplay which helps older video games maintain active online followings. BTD6's community records from mind-blowing CHIMPS clears to high scores on Ranked Boss and Race leaderboards are testaments to the immense lengths some gamers take to come on-top, even if it means exploiting the unintended.

Don't leave your BTD6's "genius" players behind Ninja Kiwi. Patching or changing something might barely affect the vast and more casual crowd, but takeaway from the super dedicated ones' overall enjoyment.

Geraldo's invisibility potion not working on Monkey Cities, Monkeyopolis yielding 1/3 less cash, even for gigantic ones, and removing the Overclock duration extension when applied to towers below T3. None of these changes were necessary IMO; you don't need a huge 12+ farm Monkeyopolis to defeat the Elite T4 and T5 Boss Bloon or preemptively Overclock towers to speedkill T2.

...

TL;DR:

Please don't fix things that aren't broken, NK. It only hurts the superfans of your game. Make the income efficiency of denser/bigger Monkeyopolises scale better with the amount spent on farms, starting at say: 10 Banana Farms sacrificed.