S*1d
I haven't had much time to look at your games yet. I'm glad you've picked up so much on the idea of 1D shogi, and I'm sure there's lots of potential there. Just taking a quick look now, I really like sheet 4 with all the weaker pieces. Honestly, subtlety often creates a more complex game than power. Weaker pieces have to work together, stronger pieces simply need a moment of weakness to exploit. And games with so many strong pieces as sheet 5 often either find their moment of exploitation far too quickly, or else they last forever with no such moment ever arising. Do you see what I mean? It's just hard to analyze, and so if a person were to make a huge blunder, the other could perhaps drop the right piece in the right place and win the game. Or else there would be so many pieces controlling so many squares simultaneously that basically there is never anything that can be exploited.
To add to that game's problems, you have an emperor. What makes the emperor work in Maka Dai Dai and Tai Shogi is that it still can be captured: you just have to capture any piece that can defend it, meaning eliminating the entire opposing army first. But how can one possibly do that when any trade keeps every piece still in play? You can't gain an upper hand, then narrow down material till you have one extra piece and your opponent has zero. All the pieces are always in play. It would never work.
Additionally, the powerful pieces are so numerous that there is no point in keeping any weak pieces at all. I noticed that such a case sometimes seemed present in Ito Shogi as we played: the pawn or heavenly horse wouldn't play much. But at the same time, shogi has its weak pieces that don't get to shine, yet could be useful at just the right moment, so I thought it worked out. But here, there are so many powerful pieces that the weak ones are literally pointless.
Sheet 3 is probably the most interesting game to me. It's not quite 1D, yet it retains aspects of 1D and 2D play. I'd suggest being truer to the 2D move while retaining the 1D. For example, the flying swallow has the 1D move, plus one square diagonally forward. It should be unlimited diagonally forward, as the original piece moved. Of course, this means a maximum of two squares, but still, it's a truer combination.
Yes, I'm working mostly backwards. I like subtle games, as I mentioned before, and sheet 2 has potential with such weak pieces. It could be just as good as my game. What I like about my original intent is that it has pieces that have so many different types of moves that various combinations could occur. Such may not be present in a weaker piece game, but other value could be, and it might play just as well, or possibly even better. As I mentioned before, the ranging pieces sometimes outshone the steppers and leapers. Perhaps not having them might let the other pieces have more time in the limelight.
So those are my brief thoughts, taking just a few minutes to look at each game. Keep up the good work, and consider what I've said, but remember that they are your games and you may do whatever you want in the end.