He'd come in and do incredibly well. He's had 5 seasons at Leinster, reached the European Knockout rounds every time and only lost away to Clermont, and to Saracens, he's won 3/4 Pro 14's including a perfect season and successfully develpoed guys like Keenan, Conners, Doris, Baird and more into international standard players. Its not like he was coming into a great set up either, Leinster went 1/6 in Europe the season before he arrived and lost to Connacht badly in the Pro 14 final and failed to qualify for the Pro 14 playoffs the season before that. He's been as good with Leinster as Joe Schmidt was, 2015 a distant memory for him.