There aren't any issues with news/sport type programmes being broadcast from productions spaces after all News 24 came from a glorified office since it opened.
Indeed, there are loads of examples of news programmes using studios in modified office space rather than 'proper' studios: BBC World has been for many years, Newsroom Southeast and then BBC London News were for almost 20 years; Midlands Today, Look East, The One Show, London Tonight all do now as do channels like Al Jazeera English and CNN
I agree. In the old days it was usually technical requirements and in ITV's case IBA specification (not to mention the unions) which meant you had to produce from a fully blown studio with all the bangs and whistles. These days production standards are far lower and the kit more flexible so you can get away with it. The only place studios are desperately needed are for Drama (such as Dr Who, who have to make a programmes in old warehouses) and Top Gear where the sound of the audience in an old hanger drowns out the presenters. I've always thought news looks better coming from a dynamic news environment provided what appears on screen is of presentable standard.
..."at the first sign of danger my pussy's hairs stand on end" Betty Slocombe 27/05/1975