Avoiding weather whatever the 'new engine' issue...per se
100 nm minimum avoidance around ITCZ -type weather has held me well over the last 40 yrs.
New engines are just being tested in-service. That will always be the case now.
Just avoid the weather.....what trainer ever told you to leave less than 100nm from severe weather? (in commercial pax a/c?). WTF?