Opinions...we all have them, some have multiple ones on the same subject! Take the two players per position concept though and based on our best 4-2-3-1 formation, our gaps are clear:
GK - 2 needed - check
LB - 2 needed - check
RB - 2 needed, we have 3 - check [setting aside some upgrades needed if we have the cash]
CB - 4 needed and we have 4 - check [ignoring contract issues]
DM - 3 - check (Dier, Wanyama, Sissoko); ignores for the minute fitness questions and what you class Sissoko as (work-horse/DM)
Creative CM - 1 - FAIL!!! Definitely 1 short
Lastly, categorising attackers/no 10s/wingers/CFs in one group to avoid debates over what Son/Moura are: Attackers - 8 needed, we only have 6 (Kane, Son, Eriksen, Dele, Lamela, Moura) who Poch seems to trust to start regularly. Llorente, Janssen and GKN don't really count given they only seem to be used in desperate measures.
Very simplistic but I think it shows we're a creative CM and at least 1, possibly 2, attacking-types short. I'd suggest its also those areas where we look most burned out at the moment. We're not really able to dominate the midfield like we used to - Winks and Sissoko are having to play all the time and Eriksen and Son look absolutely knackered. Its not helped by Lamela and Moura not really being on form, but with the 1 or 2 extra bodies we could cope with that.
Not intended to be a rant at all (post is much longer than intended!), and obviously the stadium is impacting, but those extra couple bodies make a massive difference. We're kind of caught between two stools - clubs outside the top 6 don't have European football to contend with, and other top 6 teams are richer and not building a stadium. Hopefully we can bring in two more in the summer (net of departures) who Poch trusts to play