I don't really see how players saving building builds for SPL is a problem, since it isn't just an XY/ORAS teambuilding thing, so you can choose BW2/DPP as the tier. Also, since you build around a theme or a concept, if that theme is in the SPL build, then the player can choose not to submit that team, and build another one. However, SPL probably will be the focus of the teambuilders, so there might not be that must interest, with time/effort being mostly dedicated to SPL.