The difference between the level 0 and the level 2 version is not worth the 2 XP in most of my decks as I usually play a fighter + a cluever so the added "The first investigate action you perform each turn does not provoke attacks of opportunity" is not interesting for either investigator.

But in the rare cases when I play a trio with fighter + cluever + versatile investigator, I think Alice Luxley could make me reconsider Michael Leigh:

• investigation with + 2, no attack of opportunity,
• discovering a clue gives 1 damages with Alice Luxley and 1 evidence on Michael Leigh,
• attack with any asset / event (with an added + 1 strength), use of one evidence token,
• in case of success, 1 additionnai damage thanks to Michael Leigh.

If you consider that the attack aims for 2 damages in a single action and that your 2 allies have given you 2 additional damages, you could even play Evidence! for 2 additional clues. And Alice Luxley's ability can be used on any enemy in your location: Elite, Aloof, engaged with someone else, ...

Very pricey combo XP-wise, but very efficient in this setting (i. e. investigator who has to help both with damages and clues).