CTLR CLEARED ACR-MLG FOR TKOF TOO CLOSE BEHIND CPR-LTT.

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TWR CLRED LTT Y JET INTO POS ON RWY 29L. WE WERE INSTRUCTED TO TAXI INTO POS ON RWY 29L BEHIND THE LTT Y. LTT Y WAS CLRED FOR TKOF ON RWY 29L AND ANOTHER ACR FLT WAS CLRED TO LAND ON RWY 29L. JUST AS LTT Y ROTATED WE WERE CLRED FOR TKOF. WE DID AS INSTRUCTED ANTICIPATING THE TWR WOULD TURN LTT Y OUT OF OUR DEP PATH. THEY DID NOT AND I KEPT AT LEAST 1000' VERT SEP BTWN OUR ACFT AND THE LTT Y. THE TWR TURNED LTT Y TO A 260 DEG HDG AND SHORTLY THEREAFTER TURNED US TO A 280 DEG HDG. WE WERE EACH THEN INSTRUCTED TO CONTACT DEP. IN LIGHT OF THIS EVENT I THINK THERE SHOULD BE A MINIMUM TIME SET BTWN DEPARTING ACFT OR A MINIMUM ALT THE PRECEDING ACFT HAS TO REACH PRIOR TO CLRING THE NEXT ACFT FOR TKOF. IF LTT Y HAD ABORTED OR HAD AN ENG FAILURE THINGS MIGHT HAVE BECOME A LITTLE TIGHT. IN THE FUTURE I WILL HAVE A SET PARAMETER AS TO HOW CLOSE BEHIND A PRECEDING ACFT THE TKOF ROLL IS BEGUN EVEN IF IT MEANS HAVING THE LNDG ACFT GO AROUND. I ALSO FEEL IF THINGS WERE SO TIGHT FOR THE TWR PERHAPS THEY SHOULD HAVE HAD US HOLD SHORT VERSUS TAXIING INTO POS BEHIND ANOTHER ACFT ON SAME RWY AWAITING TKOF. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR WAS ASKED IF THE INTERVAL BTWN HER FLT AND PRECEDING LTT WAS UNUSUAL AND THE REPLY WAS IN THE AFFIRMATIVE. SHE STATED THAT SHE UNDERSTANDS THE CTLR'S NEED TO MOVE TFC; BUT IN THIS INCIDENT; THE CTLR TRIED TO SQUEEZE HER FLT OUT IN A SPACE THAT WAS NOT BIG ENOUGH. SHE STATED THAT THE CTLR DID NOT INSTRUCT HER TO MAINTAIN VISUAL SEP FROM THE LTT; BUT THAT SHE DID AS A MATTER OF SURVIVAL. SHE REMARKED THAT IT WOULD HAVE BEEM MUCH BETTER FOR THE CTLR TO HAVE HER FLT WAIT; CLEAR OF THE RWY; WHILE THE INBND LANDED; AND THEN SEND HER ON HER WAY.