I guess that depends on what those other teams were missing in the lineup. You can't look at things with blinders on(not saying you are). Yes it will be good to have Encarnacion and Lind back, of course Lind is strictly a platoon guy hitting against RHP. For example the Jays play the Sox for 3 coming up Lind is likely only to play 1 of those games with Sale and Danks pitching. After that 2 in Milwaukee you may not see Lind much either with no DH.
Absolutely, you must consider the injuries of others, which makes the whole process of retrospectively quantifying results when it comes to baseball unreliable.
That being said, I can't seem to think of any of the teams that are currently within arms reach of the playoffs missing the middle of their lineup for a full month.
As for Lind, he is indeed a platoon bat; however, he is the best platoon bat vs. RHP in the league this year (.435 wOBA\179 wRC+). When not used against LHP, several others who function far better against left handers will be (Valencia **.390 wOBA\150 wRC+}, Reimold **.341 wOBA\114 wRC+}, or even Tolleson **.400 wOBA\155 wRC+}). The lineup actually sets up quite well when those two are back, and others are utilized properly.
As for the immediate future, I wouldn't get too bogged down with the matchups and how often he'll (Lind specifically) will play. I'd rather look at what he'll provide both quantitatively and qualitatively over the last 42 games.