Flames aren't the best, but they have done A LOT better the last few years.
Treliving did an excellent job in 2015, 2016, 2017. For what he had this year, I'll give him a pass (his fault for giving away so many picks), but overall he has done a really good job with his picks (only listening notable ones or ones that I've done some research on).
2015 (5 picks):
Round 2:
Rasmus Andersson (floor as a bottom pairing defensemen, ceiling as a #2. Could've been with the team last year, and frankly deserves a spot ast this point)
Oliver Kylington (floor as a AHL top pairing defensemen, ceiling as a #3 in the NHL)
Round 6:
Andrew Mangiapanie (floor as a top 6 AHLer, ceiling as a top 6 NHLer - probably ends up in between)
2016 (9 picks)
Round 1:
Matthew Tkachuk (already proven top 6 talent, could produce even more offense if given less defensive assigments)
Round 2:
Tyler Parsons (floor as an NHL backup, ceiling as an elite NHL starter)
Dillon Dube (floor as a #3 center/winger, ceiling as a #2 center - not as big of a gap, but almost a surefire NHLer if his development continues as planned)
Round 3:
Adam Fox (floor as a top pairing AHLer, ceiling as as top 4 defensemen and a PP quarterback)
Round 6:
Matthew Phillips (ultimate bust or pop pick, could end up as a career AHLer, or a top 6 RW - likely doesn't play at centre due to his size)
2017 (5 picks)
Round 1:
Juuso Valimaki (floor as a bottom pairing NHL defensemen, ceiling as a #1 defensemen - if I had to guess, probably turns into a solid #3 guy).
Round 4:
Adam Ruzicka (floor as a top 6 AHL centre, ceiling as a #2 or #3 centre in the NHL)
Round 6:
D'Artagnan Joly (has a cool ass name, and thats all that matters. Long term project, but probably has a ceiling as a bottom 6 winger in the NHL).
2018 (5 picks):
Way too soon to even start projecting, though I do like the Petterson, Roman, and Zavgod picks.