dev's network is stuck ?
It's not stuck, just slow
Unfortunately like most new coins, people are pulse mining from nicehash (high hashspeed for short time to max rewards, and then leaving and coming back later)
The difficulty increases and and when they leave with the hashspeed, the block slows vs the consistent previous hashrate.
When more miners join and increase the hashrate naturally, this is less of a problem.
For now we have limited miners so it's easy to abuse and increase/decrease the speed
(Note. before anyone asks we are not changing algo yet, potentially after i2p release we will consider it, so that is not the solution. The solution is for more people to start mining and distribute the hash power more evenly)
There is a temporary benefit to slowed network as it reduces people moving their coins into the exchanges and dumping. Limited supply vs demand = increased prices.