Why HMS Tiger was retained over the Lion-class battlecruisers

What made HMS Tiger a better ship to retain than the two surviving Lion-class battlecruisers?

Tiger was better protected, more spacious internally, easier to support around her machinery, and free of the Lion class's troublesome midships turret arrangement.

British sources of the period described the ships' main guns as 13.5-inch weapons rather than retroactively labeling them 343 mm. Tiger was more heavily built and carried a more effective armor scheme with thicker and more numerous internal bulkheads. Her machinery spaces also had greater room, giving the ship better access and margin for continued service. Turret positioning avoided the awkward midships arrangement that caused operational and structural problems in the Lion class. The panel's deliberately concise verdict is that almost every practical characteristic favored retaining Tiger.