It's not a question of trust, it's matter of time.
Depending on third parties to fill the needs of mobile export had less than obvious flaws.
People don't want to pay for plugs to enable full support, and third parties don't want to create/ update plugs for free.
As stated they are working on solutions.
The existing mobile exporter for C3 should prove that.
True. Every single engine, even software for that matter has tonnes of bugs when it is just released. Sure others fix it faster than Scirra, but that's because they have a large workforce. And that's why they charge a premium for their products, while Scirra's is still very much affordable. There are compromises in every scenario. We just need to find the one that fits our need the best.