Hey there Firo10,000 and Wind_and_free. I understand where you’re coming from, and I know waiting can be frustrating and all, but the team will deliver like they have every time previously. The team hasn’t faltered in this regard in the past, and they won’t now. They’re looking forward to the release of Spark just as much as the community, if not more, in some regards.
Unfortunately, it is not easy to predict what may pop up when working on such things. It did seem that everything was on the fast track to being complete, but sometimes as you finish things up other small things pop up that need tweaking, and then you have to do all the testing to see if everything has been ironed out again. This process takes time.
As Devwarrior has pointed out on Telegram, blockchain development is more than just code and exhaustive testing. There is lots of math involved, and game theory. It is not a simple matter in any stretch of the imagination.
It is important that the team does not rush to push it out. Spark needs to be as right as possible the first time around. An incomplete product is not fair to the community, it is not fair to the dev team, and it could result in vulnerabilities. By no means is this about low efficiency, or laziness on the development team’s end. In fact, if this was laziness and low efficiency, we’d probably be releasing it in a state similar to that of the gaming industry right now. 
Joking aside, the fact that the dev team are willing to hold back testnet until they know everything they can possibly find is complete before release is a sign of their dedication and hard work ethic, just as they have done every time previous. In case you missed it, our latest development updates have dropped, and you can find them here: Weekly Firo Development Meeting Minutes - #65 by AJaydono