I seem to be a minority opinion, but I think that "diplomacy"-style games are absolutely fascinating strategically and a great test of your skills. However, I also find that the way most people play "diplos" on Warlight is extremely boring - often nothing happens for 10 or 20 turns at a time, the game eventually staggers forward simply because someone got booted, and when things do happen they devolve into arguments over the rules.
There are ways to avoid these problems, however. It's just a design issue, and there are lots of settings which can be used to create fun and engaging "diplomacy"-style play.
I'm not really a diplomacy player on Warlight (because of the issues mentioned above), but I would recommend to look for games with a group of players who know each other and/or have played before and a game WITHOUT ALLIANCE/DECLARATION rules. Those are more likely to be interesting.
(How would you do a "better" diplo? I posted some thoughts before towards the end of this thread:https://www.warlight.net/Forum/143961-pe-attacked-didnt-take-land