There were a handful of bugs that went out with 2.0 that caused the game balance to be impacted. These were:
Set 2 Knockout Mode enemy selection was incorrect, all enemy team difficulties were randomized instead of being restricted to the selected difficulty
Ki O'dini as an opponent in Classic Campaign used a unit + item combination that resulted in a significant bug, where that specific item on specifically the unit Frisky would cause Frisky to heal 100% of max HP every 5 seconds, making the fight exceedingly difficult.
Boss encounters in Classic Campaign could spawn with War Banners of both sets, creating a minor difficulty increase.
Classic Campaign Tournament encounters were using a fixed difficulty set for Tier Ups rather than being influenced by the Challenge Climb system. This resulted in different (sometimes slightly more) Tier Ups applied to their armies than intended.
In addition to these bugs, we observed many players diving straight into the Challenge Climb level they used to play at immediately for Set 2, but since Set 2 is so different from Set 1, the same skillset that allows you to overcome high Challenge Climb levels isn't automatically present when returning to the game.
For this reason, Set 2 now uses its own separate Challenge Climb unlock set, starting back at the beginning with Challenge Climb 1. This is retroactive - if you have already completed a Set 2 CC20 run, all challenge climb levels will be unlocked. Also, there is now a first-time popup when choosing Classic Campaign with Set 2, which explains that jumping straight into a high difficulty is not advisable and explains the reason for the separate Challenge Climb state. As with all unlocks, you can skip the difficulty climb and all unlocks altogether in the Extra Options menu (located in the Unlocks tab from main menu).
A new feature called Trials adds large game-altering mechanics, 20 Trials in total, bringing a fresh new coat of paint to your Classic Campaign runs. Each is locked behind completing a specific Challenge Climb level (retroactive if you have already done so). There are a ton of new Trials to take on, and each one will display your highest completed Challenge Climb level while also playing with the Trial Mode. 7 new Achievements have been added related to the Trials system.
Trials are NOT DLC-exclusive, though there are some challenges specific to Set 2 that do require the DLC. All achievements related to Trials can be completed without the DLC.
Trials are exclusive to our staple core game mode, Classic Campaign.
Some of the new Trials mentioned above include cross-set runs, so you can play with both Set 1 and Set 2 mixed together! For maximum chaos, try the Trial of Madness, where not only Set 1 and Set 2 are mixed, but ALL of the Unit traits are randomized! And this is not exclusive to the Traits of the Set the Unit originated from, meaning Set 2 Traits can now appear on Set 1 Units! Anything is possible!
We apologize for the new PVP perk system having been released in Set 2 without Chinese translations. These texts were missed in the translation pass, and while they are being done presently, we have decided to machine translate these texts temporarily so at least they are not displaying in English. No English text should be seen now when playing in Chinese. If any are spotted, please use the F1 bug report system and we will address them as fast as possible.
（机器翻译）
对于新的 PVP 特性系统在第二赛季上线时未提供中文翻译，我们深表歉意。这些文本在翻译过程中被遗漏了。虽然目前正在进行正式翻译，但我们决定暂时对这些文本进行机器翻译，至少确保它们不会继续以英文显示。
现在，以中文进行游戏时应该不会再看到任何英文文本。如果发现仍有英文文本，请使用 F1 举报系统提交错误报告，我们会尽快处理。