Firework Event Object Conversion Experiment

Last time, I didn't finish the firework event and when it ended, the fireworks turned into gems! So this time, I thought I'd earn a ton of gems! I intentionally only did half of the firework event and saved some fireworks to experiment. The conclusion is... a bit of a failure. lol It seems like the rewards have been nerfed compared to before... T_T During the event, as shown in the picture, I made all stages of fireworks (1, 2, 3, 4). I used a bit of the stage 3 and 4 fireworks and saved the rest. Just in case, I also saved brand new stage 2 fireworks. Stage 1 fireworks turned into gold coins. Stage 2 fireworks, regardless of whether they were used or not, all turned into regular shooting stars. Stage 3 fireworks turned into level 3 gems that give 15 gems. Stage 4 fireworks turned into level 2 dragon stars. During the last event, I'm not entirely sure, but I remember stage 1 fireworks turning into level 1 gems, like in the attached firework change notice. Stage 2 fireworks turned into level 1 dragon stars. Stage 3 fireworks were the same as this time, level 3 gems. So I thought, 'If I don't use the stage 2 fireworks and convert them all into level 1 dragon gems, it'll be an unbelievable profit!' and tried it, but it seems the firework conversion rewards have been nerfed. T_T So sad.