I find Eddie Robson's writing a bit variable, but The Jigsaw War is definitely hit rather than miss. Fraser Hines as Jamie, occasionally channelling the Second Doctor, is joined by Dominic Mafham as his interrogator / captor / fellow prisoner, and must assemble the different elements of a disjointed timeline in order to resolve the plot. It's a straight two-hander, all dialogue and no narration, an original idea implemented well, and requiring only minimal knowledge of Who to appreciate.
I'm afraid I was not as impressed by Ken Bentley's The Rings of Ikiria, with Richard Franklin reprising Mike Yates and Felicity Duncan as several female characters. The plot is basically a rip-off of Claws of Axos; Yates, who at this point in continuity has only just arrived at UNIT, keeps emoting about how it is his only real home and then has to have most of the story explained to him, including the parts that were blindingly obvious. I'm prejudiced, as I'm not a fan of Yates or Franklin, and I will admit that there is one glorious image of the Third Doctor's face revealed in crop circles, but on the whole I think this one is skippable.
In summary: The Jigsaw War is an excellent concept done well, The Revenants will please Ian and Barbara fans, and The Rings of Ikiria wasn't all that special.