When block time will be normaly?
Lets give it some time. The emissions should eventually average out at the targeted 90 seconds average. Its barely been 400 Blocks since the Hard Fork. But I here what your saying although its still probably a little early to even begin timing 24 hour averages yet.
Block time will become normal since the moment actual net hashrate will be equal to hashrate shown in stats and stay constant. Fluctuations are main problem. I have no idea how to do it (may be total brain surgery))) You should read about auto difficulty adjust and how algo works in general. Big hashes comes when difficulty low, catch fast blocks, rise difficulty up and go out. You stay in and mine this high difficulty blocks and so on.
If developers decrease this delay, then big hashes will mine a lot of coins without any useful for the project. Then value of token dumped to zero. Investors come to developers and ask "where is my f...ing money?" And so on..