I assume this means that someone is getting dropped from the 90-man roster, since the addition of Lewis brings the total number of tight ends Green Bay has signed to seven, with an average age of just under 27 years. Between Kendricks, Graham, and Lewis -- the three most likely to make the final roster, in my opinion -- the average age is almost 32. So these definitely strike me as "win-now" signings meant to improve Green Bay's red-zone dominance, which has flagged in recent years. Given that Rodgers used to be the best red-zone quarterback in the league by a wide margin, it's nice to see the team giving him some more assets. Sending Graham (6'7''), Lewis (6'6''), St. Brown (6'5''), Moore (6'3''), and Clark (6'6'') into the end zone all at once should provide some match-up nightmares for opposing defensive backs.
Come to think of it, Green Bay might well be going into this season with the tallest receiving corps in the league.
Not to mention, anything this team can do to improve its run blocking can only be seen as a positive.