I am only a 21 year old, but I'd consider myself a traditionalist.  I also know that you really can't turn the clock back (ie, we are going to keep 3 divisions per league for a while, etc.).  But these are 
my beliefs:
DH Horrible.  Just no need for it anymore.  It was introduced to increase offense, because in 1973 (or there abouts) the game was pitching dominated.  There is no need for that anymore.  Players should be players, if you field, you should hit, and vice versa.  Selig actually was smart on this (imagine that) and offered the MLBPA to add another roster spot to each team, if the DH was taken away in the AL.  The MLBPA refused, showing their true colors.
Saying that, I don't think Free Agency is bad at all.  I just think that there should be comprehensive revenue sharing, with minimim and maximum salary caps (and floors).
Wildcard This probably isn't going away, but I don't like it.  Someone refered to the 1993 race between Atlanta and San Fran, where Atlanta won 103 games and got to move on and San Fran won 102 games and stayed home.  Even though I rooted for the Giants, I thought that was great.  It added something to the end of the year.  If there was a wildcard then, both teams would have qualified for the playoffs earlier, and the late season drama (with the Dodgers beating the Giants on the last day to prevent a playoff... ouch) were unparallel.  I've never seen a season like that, and I fear I never will (and no, even though I live in New Jersey, the Subway Series of 2000 doesn't compare... at all).
Bob Costas had a great idea (which merges the WC with 
Divisions)... to take away the Wild Card, and just have the division winners play each other.  The team with the best record would get a bye for the first round.  It sounded like the smartest plan to me.
Of course it seems the WC is here to stay  

.  Hopefully it won't expand any further.  We don't want to turn this into the NHL where just about every team is in the playoff race until the last week of the season no matter what their record is (even if they are 0-80  <img border="0" title="" alt="[Wink]" src="wink.gif" /> ).
Interleague  I'd like to quote something someone earlier said:
 </font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">I likewise hate interleague play, but, as a Royals fan from the middle of Kansas, there's no other way I'm ever going to see Barry Bonds play in person, so I take it as a necessary evil.</font><hr /></blockquote><font size="2" face="Verdana, Arial">You won't anyway.  The way the numnuts drew up interleague play, the AL East plays the NL East and the Central plays the Central, etc., for time immemoral!!  This is silly.  Interleague play was for people to see players they've never seen before.  They still can't see them.  If they were going to do interleague play, they should have rotated which division plays which division.  You still would have Yankees-Mets every three years.  I mean, you play them every year, and in 5 years, it'll get old and stale.  If you rotate divisions, then when it comes back to the East v. East, you got something to talk about.
That said, I'm against interleague play in general.  I think AL players should only face off against NL players in Spring Training, the All Star Game, and the World Series.
Thus endeth my sermon.  Carry on  

 .