If you want to view just four angles of your multicam cut rather than 9, 16 etc you have to make this change via 'Edit Cameras' for every edit in your timeline as it only affects the first clip you have selected and not your multi-selection. There is no global option to affect all instances of the group. This is very painful for a 90 minute concert with thousands of cuts.
Also you should be able to select, say, all the close up shots and view them against your cut to make sure you have the best moments but you'd have to set this up for each edit too at present.
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