At least they started to listen a bit!
24/1.4 is one of key lenses for usable FF system, while 85/1.4 is pretty specific portrait lens and we already have 77/1.8 and 70/2.4, while there is nothing available on the wide part of range.. 20, 24, 28, ony FA31/1.8Ltd and then mediocre 35/2.. or the tamron zoom 24-70/2.8 which is not bad, but still just F2.8 tamron zoom.. nothing to write home about and nothing to attract users who can buy original tamron 24-70/2.8 for other systems cheaper.
35/1.4.. at least we still have Sigma 35/1.4 Art, so this focal length is not the most painful. But in future this should be covered by some DFA*35/1.4 too..
DFA 70-300 is obvious, but it will be cute to prepare one lens for both FF and APS-C.. some 60-300 or 55-300. Then they can remove all 55-300 models and use the same production resources.
70-200/4 again.. lets do it a bit wider to fit both customer camps... 60-200/4 will be better and nobody else has lens like that. DA*60-250/4 was pretty interesting lens.. that design can be modified to fit FF camera and then it would again be something special that others do not have... DFA*60-250/4.. why not? Put a reliable motor inside, keep competitive price and you'll see results quickly.
Ricoh should try to offer options that others do not have to attract some newcomers. If they just copy what canon, nikon and Sony already have, then there is no way, that customers would switch..
Concerning DA*16-50/2.8 successor.. I'm asking for such lens for several years. Current DA*16-50 is just overpriced mediocre lens. Sig 17-50/2-8 is optically better and cost 1/3. But if they manage to redesign it into DA*11-18/2.8 level optically, I would buy that and keep sigma for backup camera. That focal range is very important if they want to offer some hi-end APS-C cameras.
Lets hope it would be something better than just DA*16-50/2.8 with HD coating... if it takes few years to develop it, they hopefuly are working on optical redesign too