I am a long-time Takenoko fan and played my first game with the new rules tonight, and... honestly? I thought the changes were mostly bad. Of course, I need to play it more to be sure, but I felt the downsides far outweighed any upsides, and dramatically change the nature of the game from a light, quick, and fun crowd-pleaser to one that imposes frustrating limitations that drag the game out.
First of all, BGA needs to put the updated rules on the game page; when I tried to collect my first irrigation tile and realized I had to place it immediately, I went looking for an explanation and could not find it. I didn't encounter this FAQ until I was nearly finished with the game.
Okay, the upsides: I do think the cleaner, clearer design is an improvement. And rain growing bamboo on non-irrigated tiles seems interesting. That's about it, though. The downsides for me are basically all the other changes.
Requiring the gardener to be on the tile in order to complete the objective means those objectives immediately become much harder to achieve, and far easier for opponents to sabotage. It also draws out the playing time because it's harder to achieve those goals.
Immediate placement of the improvements and irrigation are also frustrating. They eliminate the late-game plot goal strategy, which was a good way to counter the panda rush. They also actually make it harder to complete the tile goals, it seems to me. Furthermore, being able to place improvements onto tiles that already have bamboo again only seems to serve to extend the game, because it makes finishing gardener goals (already made more difficult by the requirement to have the gardener on the tile) even more problematical.
I just finished my first 3-player game with the new rules and it took 43 MINUTES! That is insanity. I'm sure the time will go down as people understand the new rules, but that's waaaaay too long for a game of Takenoko. I've knocked out 4-player games on BGA in 15 or 20 minutes, and they were fun and satisfying experiences.
I'll try the new rules a time or two more now that I understand them, but I cannot see myself using them regularly. The original rule set is so much smoother and allows much greater strategic flexibility. Glad I still have my first edition set so I can ignore the new rules IRL as long as I want.