You started with 4-3-3 for crying out loud, it couldn't have been much more open. You had Allen, Gerrard and Lucas in midfield, only one of which is defensively minded, and Coutinho, Sterling and Suarez up top, none of whom are defensively minded. You can say you've not got the players to play any differently, but even then, that's down to the manager.
It hasn't worked all season though. It's worked for most of the season, but in games when Liverpool haven't been winning at half-time, or haven't been winning by much, they've looked shaky. It was extremely likely that this would be the case against Chelsea, yet Rodgers decided to play the same thing again, and it cost you.
Liverpool have won 25 games this year, drawn 5, lost 6. Of the 25 that they've won, they were leading at half time in 21. They've been leading at half time 24 times this season. They were only a goal up in the 3 games in which they didn't go on to win, and in all instances they ended up drawing. In fact, of the 11 matches in which Liverpool led by a single goal at half time, they only managed to increase the margin of victory in 4.
Of the 12 occasions in which Liverpool have reached half-time not winning, they've won just 4. They've gone in behind 5 times, only managing to salvage a single point (against Villa), and gone in level 7 times, winning 4, drawing 2, and losing 1. There have only been 3 games this season in which Liverpool have reached half time without scoring, once at 0-0, and twice 1-0 down. On all three occasions, they lost.
All season Liverpool have relied on going in at half time ahead, and when they haven't, they've generally looked clueless. Considering they've basically played the same tactic all season, it might have been prudent to switch it up a bit against a team that basically had the perfect foil to it.