Could it be possible Bachmann pushed out Grumpy Diesel because Daisy or some other engine wasn't finished/is taking longer to make and they wanted to announce at least one HO engine? As said by others I too also think it's a bit lazy and I won't be buying the whole engine again for one face. For the faceplates, other engines like Thomas, Percy, James, etc could have benefited way more to have newer faces first. Diesel's, albeit not being grumpy, had a perfectly fine face (though grumpy would've been nice back in 2011) so I wouldn't expect him to be the first to have a change. As for the tankers, just more recoloring old toolings so nothing too major but it's nice to have some more variety I guess. Having the Spiteful Brake Van in HO to replace the old one (which was suspiciously removed from the catalog) will be a very nice change so I'm assuming we may get a normal variant soon. As for the Narrow Gauge and Large Scale stuff, I don't collect them [yet?] so I don't have any full opinion on them, though just from talking to others I can see how they're upset with there still not being an Edward yet.

For 2017, my wishlist is

HO:
-Color Corrected James (also hoping for a CGI styled face)
-Rosie (Even though she was announced, we are all hoping she is released soon. Therefore, she can be on my wishlist once she is available)
-Paxton (friendly and helpful character who would be great to have, easy recolor of Diesel/Arry/Bert)
-Sidney (same as above)
-Stafford (would be quite easy to make as he is small and short, but would be a very nice character to have)
-Charlie (while he may not be the best character, he has an interesting basis that would look very splendid)

N Scale:
-Sir Handel
I have a feeling that Bachmann is simply doing one narrow gauge engine per year so I'd just go with Sir Handel for 2017 or maybe even 2018 as he is the next engine in line, going by number order, after Rheneas.

Large Scale:
-Edward (highly requested by many people, and would fit right in with the other engines in the range)
-Diesel (There are currently no diesels in the Large Scale range so Diesel would be a nice change)
-Henrietta (There's a LS Toby, but his faithful coach hasn't been made yet. Especially after gaining a face in more recent CGI seasons, having her made [hopefully with a face] to go along with Toby. If she is made with a face, maybe she could be rereleased with a face in HO scale seeing as recent releases from Bachmann are CGI-styled. (e.g. Diesel, Skarloey, Toad))