That's a very good thing for the game to get a new game mode!
Also amongst the followup ideas, the land related one is the most important one. The ability to create a valuable item using land will give actual use and value to plots and help reaching the original land goal (locked DEC, locked cards, ...). This will also create a new market and earnings for players and the company.
Please finally give some actual use to land plots!
RE: Introducing Splinterlands Survival Mode