A brief tutorial campaign would have been a good idea and I think it would have increased the popularity of the game. The tutorials provided give little indication of gameplay strategy per se. But that's all water under the bridge, too late now.
To me, StarCraft had a really good campaign introduction. You would play through only a few missions until you felt you knew how the game basically worked, and then go to some maps to fight the computer on more equal turf. Or you would go online.
Sins put itself in the position of telling players, "well to swim you basically swing your arms and kick your feet, take a breath now and again." And then they tossed players into the deep end of the pool. This worked for experienced gamers who floundered about a bit and then got the hang of it. It left less experienced gamers and people new to this kind of game altogether facing a screen and wondering what to do, when to do it, and a host of other questions. Many if not most of them drowned.
Those with experience, patience, and persistence learned to play. The rest quietly put the game on a shelf to gather dust. Which is tragic.
Even now, it is not obvious how a new player would go about finding an official "getting started" strategy guide for either Sins or Entrenchment. Some simple narrated youtube videos would have also helped new players with the basic build out. I'm not sure there is even an official up to date strategy guide, or indeed official documentation of any kind.
