Of course different customers want different things. Sometimes I see posts exactly like the ones in this thread, but about completely different things, or even arguing the exact opposite. "The thing Scirra is currently working on is not my priority, I'd rather it was <range of other possibilities>" is an evergreen post that has always come up, year after year. As we have limited resources we have to prioritise what lots of people want. This is why we set up the feature suggestions platform with voting. Things posted in the forum are easily lost and forgotten, and are difficult to justify prioritising if it only sounds like one or two people want them, which is exactly why we set up that system with voting, so I'd advise you go there for your proposals.
BTW:
What I am asking is a simple feature that uses mesh editor to generate the terrain much easier
In my estimation, this is not remotely a simple feature. It involves sophisticated computer graphics algorithms and advanced editing features. It could be a few months of work. It's extremely difficult to justify features involving that much work without knowing that it is a popular request (hence the voting system). If only a few people want it, then I'd expect to see lots of posts like "instead of Scirra working on more mesh features, I'd rather see 3D/audio features/data storage/advanced random improvements/etc..." Like I keep saying, we can't ever win this battle, we just have to make a choice one way or another.