I never saw the game, but giving up three goals at home worries me, regardless of the final score.
Yeah, I think one of our main priorities in the summer will be to bring in a central defender.
Saying that, I think this game was more just one of those freakish contests. After we went 3-0 up, we seemed quite happy to step down one gear and even invited Bournemouth to have more of the ball while we would wait for counterattacking opportunities. Along with that, Bournemouth must have thought, "well, we might as well have a go, we know what it's like losing 4-0 or 5-0 in games but if we can score one then that would be a consolation". When their goal went in they just went into attacking overdrive and they were winning more battles in the centre of the pitch. We struggled to contain them and clear the ball but because they were very much committed to attacking and scoring, they were extremely suspect at the back and once we made the defensive subs we managed to gain more control of the game and score another 3. Also without Robles making a few key saves, Bournemouth would have likely gone 4-3 up.
I expect we'll concede more soft goals in the next few months but I don't expect us to concede 3 goals per game or even 2 goals per game on average between now and the end of the season.