Ultimately to me, the goal is still to build a baseball team, but being that this game is really more of a market economics game disguised as baseball, economic decisions still make the most sense. Primary among those decisions is how to minimize risk and maximize return at the same time. Those that 'put all their eggs in one basket' can have a really great return at times - even blow away their leagues and win a WS. They can also become Randolph and Mortimer losing $394M in frozen concentrated orange juice. Those that take appropriate risk can sustain game-changing events and even benefit from them.
I have two teams - one has a lot of power - the other not so much. Both are WS caliber teams (wrt to the world talent levels). The team with a lot of power has players that are across-the-board good (not MVP) hitters. They are also good-to-great defenders. If they hit fewer homers, it's probably not a big deal. I'm going to also benefit greatly from their defense. The team without a ton of power has one hitter with a 99 power rating, but he alone doesn't carry the team. In fact, I made it a point to trade away a similar guy with a 94 power rating to allow a better all-around guy to come in.
After the engine change, bTW, my 93 power guy on the first team I mentioned hit 12 home runs in the post season. Small snapshot (not "sample size" - a badly misapplied term around here) I know, but it didn't seem to affect him any.