You've pretty much taken the exact words from my mouth fella, my feelings entirely
If Spurs had a half decent striker last year they'd have finished top four, Soldado is just that player (why were Arsenal not interested??) and whilst I agree they are likely to lose Bale to Madrid, the £80m or whatever they will get for him will allow them to strengthen their squad massively. I just don't see Arsenal's fragile, injury prone (Wilshere, Sagna, Vermaelen, Koscielny, Rosicky all seem to spend more time on the treatment table than the pitch) squad being strengthened at all this summer so far, in fact Suarez is the only player I've heard them linked with this transfer window who hasn't already been signed by someone else. What is Wenger going to do when/if he is unsuccessful in his chase for his only identified target? There were loads of noises coming out of The Emirates this year about how this summer was going to be the one where the cash was going to be splashed - so what has happened? We're a week from the first kick-off and the squad hasn't been improved at all, and even if Suarez does sign (which I don't think he will) he won't be available until September by which time they could be at least half a dozen points off the pace already.
I'm sorry, but I also just do not understand how on earth you think they could be challenging for the title this season, I reckon they'll be at least a dozen points behind Chelsea by the time May comes around, there is just absolutely no comparison between the two squads if you ask me - how many Gooners would get into Mourinho's starting XI for example?