Funny enough, last season I was creating a team, I was a significantly higher elo and I couldn't play with my friends (I was about two tiers above them), and we had 4 players - in the midst of recruiting the last one. We even had team comps planned out, I created an account to play ranked and practice Yasuo for our Malphite combo, without sacrificing elo, and guess what happened...
Dynamic Queue, where Solo - 5 man premades play on the same ladder... which completely removed Ranked 5's.
Now I can't play with my friends, unless I smurf, and they don't want get carried, they just want to share a rank that reflects our skill as a team .
Clubs/Tags won't ever fill that empty space because even though Dynamic Queue was made to "play with friends", I can't unless I smurf and boost their individual rank. I wish we actually had our team name on a ladder where we could compare our team against others teams again.