Yeah I think it is a toss up, as a lot depends on averages and games played, as well as potential cover scores. In years gone past I was reasonably confident I could cover a short term miss with an 80, meaning the other player would need to significantly out average the one I brought in. Eg in your example, if I went Oliver (100 average) to Serong (115 average) over the last 11 rounds, that is +165 points, which is still +130 if an bench score of 80 covered Serong for a week. But this year with the poor rookie options we're likely to be left with and the sub rule, the cover score could easily be a 30 or 40, meaning any advantage is eaten away quickly.
That said, I think the fact Oliver still has a bye means you get a pretty handy boost by making that trade. If we use the Oliver 100 and Serong 115 examples above, you'll get 11x115 from Serong (1265 points) and 10x100 from Oliver (1000 points). +265 is a pretty handy headstart right there! I definitely wouldn't be advocating a sideways trade to someone with that higher upside, but guys like Serong and Butters who have had the bye and a +1 game count coupled with being a top 2-3 scorer are much more worth it.
But the caveat to that is, how many trades will you have with a complete team if you also make that sideways move?
That said, I think the fact Oliver still has a bye means you get a pretty handy boost by making that trade. If we use the Oliver 100 and Serong 115 examples above, you'll get 11x115 from Serong (1265 points) and 10x100 from Oliver (1000 points). +265 is a pretty handy headstart right there! I definitely wouldn't be advocating a sideways trade to someone with that higher upside, but guys like Serong and Butters who have had the bye and a +1 game count coupled with being a top 2-3 scorer are much more worth it.
But the caveat to that is, how many trades will you have with a complete team if you also make that sideways move?
In my case I have one upgrade to do, which pretty much has to be Heeney, and that will take two more trades, leaving me with six and Oliver/Bolton as my worst premiums. I may be better off trying to get Shai to a 23rd premium rather than binning Oliver now.
For my team Serong’s points wouldn’t all be incremental (I am likely to have 18 green dots) and bringing him in this round would necessitate trading Moyle, who is an outside chance to play next round and continue making cash for me. The price difference between Oliver and Serong could be a reasonable contribution to getting Comben or Moyle up to another premium as well. Lots of factors to weigh up, but I’m erring on just doing Wilson to Grundy this round and reassessing. I think we’ve had a fairly good run (collectively - not everyone) with premiums avoiding LTIs this year, so I’m wary of assuming that will continue!