What was at stake was the need to...

Does the highlighted section imply "however, what in both of these historical contexts, as well as in the Docklands poster campaign was not paid attention to was the essentiality of communicating quickly and effectively. The imagery and texts were not straightforward and explicit and did not deliver short incisive messages in the manner of advertising or propaganda"?

Context:

However, what was essentially at stake in both of these historical contexts, as well as in the Docklands poster campaign, was the need to communicate quickly and effectively. The imagery and texts used needed to be straightforward and explicit, delivering short incisive messages, in the manner of advertising or propaganda. While the situation for 1980s billboard and poster artists was not so acute, politics was nevertheless dominated by similarly repressive right-wing forces, prompting a similar appropriation of popular forms by certain politically minded artists.